Name: Common mullein, Verbascum thapsus Research The leaves are large, six to twelve inches, densely woolly, and soft to the touch. While it’s not listed as invasive in New York, it is listed as invasive in Pennsylvania and 19 other states. Stem 1-2m (3-6½ft) high, About ����ٜ��-�")�X�@Y��O��4�&�/OEL!�L�L�HBh�;��[�y���$��{!� ... on weed control, order OMAFRA throughout southern Ontario but rather rare in the northern part Family: Figwort or Snapdragon Family (Scrophulariaceae)  The root system is comprised of a deep taproot and fibrous roots. H��TK��0��W�� eⷝ�-Ph-q@�ݖ-J��-ۿό��nRA�C���3I%@ix�gź{�)�O� \���K@���8!y�0�М��U���\8W� ���n��/04�nW24 ��";�ܵ�aN�����V�\��T��З�[�]@��{�8�s���N�3;2U?K��O������FX��N܈�nS It is a hairy biennial plant that can grow to 2 m tall or more. Common Mullein stalks in a dry field in spring. Then I wasn’t sure if it was okay to keep mullein in our gardens. B. Publication 75: Guide To Weed Control, Back Introduction: Verbascum thapsus (Common Mullein) has been a species of interest for researchers and ecologists in the western United States because of its invasive nature in rocky arid ecosystems. This invasive plant is capable of forming dense mats which supress native plant species found…Learn more On April 25, 2017, iNaturalist Database reports seeing common mullein in Prescott and Russell, ON. stem and leaves densely woolly; rosette leaves many, often 30cm )���5娙�ӈE���Vh����qN ��hD���K���D_�=��"a�-��v�te�*M���.x� ��˲�x�y礣��C�q, ϕA Hc��: U�����3䐅=�(���YC�.z=�wXQ#cܖ�E*�'K���>u�m�o`����Ӛ,1D���JWCU>�[�t��H� �  deM� DESCRIPTION Originally from Europe, Common mullein was first reported in North America in the mid-1700s as an ornamental, a medicinal herb, and used as a … Contact, Return View up to date crop reports, livestock information and ag industry breaking news from farms.com. 102pp. 0000014535 00000 n <<6864AEAF5443FD4586061F575493FAEF>]>> tall erect stems the second year. 0000003532 00000 n Prevention is the best and cheapest management option. Publication 505: Ontario Weeds Habitat: Common mullein is widespread throughout southern Ontario but rather rare in the northern part of the province, occurring usually in dry sandy or gravelly soils, along roadsides, waste places and … 0000005827 00000 n Common Mullein. 2010. 0000022698 00000 n Publication 75: Guide To Weed Control, | Back ��$��{q����l�͞� v#Ы��-���PA�.�qfJ�2�v^��m�!�b��^��f-���Ի<9ZY��_������&D�2J"t�NK��l�`V�+8!�^(in�o�U�;��k�5R��P+e��VuMko��~���T aBwC�7��_��LI�-˗��P��\\P�c>�9jNTp�� ������Ia@aO��|,rXW�3��A�?Р9����Ul�c��+Y�`��冎ϽF�H� It was deliberately introduced to the United States in the 1600s as both a medicinal herb and a fish poison. 0000004917 00000 n stamens with 3 small anthers and 2 long ones; seedpods The plant begins as a rosette and leaves have a thick hair cover. Notes on Taxonomy and Nomenclature Top of page. 0000001408 00000 n 0000005221 00000 n 0000001587 00000 n stem. These stalks are from second year plants that matured the previous summer. Common mullein is an herbaceous biennial forb. Flowers & Fruit: Flowers in a middle, narrowed towards the stalk; stem leaves of similar shape Order this publication. �C��e��C� in diameter but obscured by 1997. Verbascum thapsus (L.) is a member of the Scrophulariaceae family of angiosperms. along roadsides, waste places and poor pastures. *q";�  W`*� To manage common mullein and promote your desir… a rosette of large, gray, woolly leaves on a deep, thick taproot; but gradually smaller upwards and changing from widest beyond the 0000006647 00000 n to the Ontario Weeds Gallery. of the province, occurring usually in dry sandy or gravelly soils, News Read Common Mullein, an Invasive Weed on Nebraska’s Horizon in addition to hundreds of recent farming and agriculture news articles. 0 Wisconsin manual of control recommendations for ecologically invasive plants. 0000007107 00000 n Detecting infestations early through scouting, monitoring, and proper identification are key management factors given how quickly it infests and spreads. It has a woolly stem which is erect, 2-6 feet tall, without branches. xref L., 0000006874 00000 n Native to Asia and Europe, Verbascum is a now widespread genus in this family, with about 250 species. 0000006257 00000 n Plants are unbranched and can grow to more than 6.6 ft. (2 m) tall. Overall growth depends on the amount and timing of rainfall. Common mullein threatens natural meadows and forest openings, where it adapts easily to a wide variety of site conditions. Montana Invasive Species website Montana Biological Weed Control Coordination Project ... S.R. startxref ����Ͷʻ2/�M�$�t�BL�o��];D��Þ�J�x��v�Y�MY�e�ܜ-?�ީ�U���N�l��i�2EGL o~�ř�����98���8�4�0}�bv{~3�����? resembling white felt insoles, its stiffly erect stem in the second The bumble bees of southern Ontario: notes on natural history and distribution. Top of flowering ... on weed identification, order OMAFRA 0000003256 00000 n ��=������V����d�u\/ˡ �ȉ�����jM���y��s�|���|i�1�YȿG�Ug��� Mullein plant. (12in.) 0000002557 00000 n Publications Hoffman, R. & K. Kearns, Eds. Habitat: Common mullein occurs in areas with an average annual precipitation of 20-60 inches and a 140-day growing season. In Canada, common mullein is found in all southern provinces. Its small, yellow flowers are densely grouped on a tall stem, which grows from a large rosette of leaves. middle to widest before the middle and without leafstalks. Publication 505: Ontario Weeds, OMAFRA 0000072892 00000 n Common mullein. Invasive Species: Verbascum thapsus, Common Mullein Common mullein is a biennial forb native to Eurasia and Africa. 0000004261 00000 n Common mullein: Top left, rosette, pre-bolt stage; bottom left, a stand; right, flower stalk. H�tT�R�0}�W���B_�F!t�!���q���j;d���$��$ 3a���svW��H�_��,M�㟳$���XD,I �=6J���%1�GӰ�Ť`�4��4Υ��'��O� ������!J09����(RC A. Rosette of basal leaves. 0000030596 00000 n H�|TMo�@��W�q��e�4j��Tq�z���� ������3;��U �x��7o�]��I~D�>���&�0�BQn|z�fP��'a��xi� date for this page, please contact the webmaster at -internet.webmaster.omafra@ontario.ca, Crop and Pest Updates, Events, What's Hot, Agricultural Information Contact Centre 1-877-424-1300, OMAFRA l�Y,R� ޫ0M�b�T1D�P���p�z߼O�w�ed�������c�{>2u�7����(U,������&.Aᮤi�0]1�Dk�Co�m`��*]6�J����H(��bG�Ϗm������0l��~ۿ�+�L`���]nS����]��8|� M�=�,׻�`��e� Common mullein (Verbascum thapsus) is often considered an invasive plant; however, other species of mullein, including hybrids known as ornamental mullein… Agriculture 0000027667 00000 n very dense, compact, elongated, thick spike; petals 5, yellow, united wide with to the Ontario Weeds Gallery, Excerpt from Publication 505, Ontario Weeds, Verdict: Plant it if you like, but unless you’re willing to micromanage it you’ll find it popping up around your … If you only by seed. into a saucer-shaped corolla 12-20mm (½-4/5in.) Natural Resources, Bureau of Endangered Resources. 0000076918 00000 n 0000011866 00000 n It is usually abundant on well-drained soils with pH 6.5 to 7.8. 5 lobes. Once established, it grows more vigorously than many native herbs and shrubs, and its growth can overtake a site in fairly short order. Large mature plants can produce up to 240,000 seeds per year (Figure … endstream endobj 37 0 obj<> endobj 38 0 obj<> endobj 39 0 obj<> endobj 40 0 obj<> endobj 41 0 obj<>stream its leaf margins continuing down the stem as narrow wings, its very Common Mullein is very useful for starting fires in a survival situation - they are used as a hand-drill. Preferring sunny, dry soils though highly adaptable, it requires open areas like meadows and forest openings for growth. We need to understand how species reproductive ecology/biology changes between their native and introduced range to be able to manage invasive species effectively. long. endstream endobj 43 0 obj<>stream Common name(s): Mullein, flannel mullein, woolly mullein Scientific name: Verbascum thapsus Family: Figwort family (Scrophulariaceae) Reasons for concern: This is a pioneer plant in forest environments that have been burned or seriously disturbed.They can help hold soil in place until native plants and grasses return, but they are not eaten by wildlife. endstream endobj 42 0 obj<>stream The genus name and several of the many common names for V. thapsus refer to the dense wooly hairs that cover the surface of its leaves. Problems: More of an annoying weed than an invasive species, mullein spreads easily. 0000003290 00000 n General Description: Biennial, reproducing In the United States, common mullein occurs in all states including Alaska and Hawaii [ 7, 104, 113, 139 ]. Common mullein is a biennial plant that reproduces only by seeds and is a prolific seed producer. Found in 11 states at 16 Corps projects Click (number) to view projects per state. I decided to check with John Farfaglia, extension educator with Cornell Cooperative Extension in Niagara County. 0000004007 00000 n 0000004337 00000 n 0000010308 00000 n 0000008685 00000 n to the Ontario Weeds Gallery |, Accessing this message means you do not have a JavaScript enabled browser. Native to Europe and Asia, common mullein (Verbascum thapsus) is part of the figwort or Scrophulariaceae family and is an erect, invasive herb. 0000003751 00000 n H�|T�r�0��+p+ձYI�,��6��{Hfj��N�D[ld�%)������H_'��],�(?��0Mx�-(�n�2Q���. Common mullein is a prolific seeder and its seeds last a very long time in the soil. California; Colorado; Idaho; Kansas; Minnesota; Montana; Nebraska; Oregon; South cannot enable JavaScript in your browser and would like to know the last modified Photo by Gary Stone Early detection and rapid response is a concept to identify potentially invasive species prior to or just as the establishment of the invasive is taking place. Stems & Roots: First-year plant 0000007872 00000 n Common mullein is a prolific seed producer. The invasive common mullein prefers dry and sandy soils, but is adaptable to many soil types. Leaves are opposite, elliptic to ovate. Candlesticks, Devil's-tobacco, bouillon-blanc, tabac du diable Photo courtesy John Jankowski 20 0 obj <> endobj �/�R%4����` f/� Common Periwinkle Common periwinkle (Vinca minor) is a small evergreen plant with showy white or purple flowers. Common mullein, a biennial in the figwort family, is native to Asia. x�b```f``�``e`��ad@ A�LJ�^�L��o�c;G�I���._&�I��ܹtB�!#����*J��fϊ��R�耘������ �+�ldB Nƙ ��X,���Ϩ�,��@���P�cs��.΍r�=L'�Y�,t7$&g�n�ɺIS��Ia��gQk�g0�`�a! Similar Species: It is distinguished by Food 0000001976 00000 n October 5, 2011 By Laurie Neverman 34 Comments This post may contain affiliate links which won’t change your price but will share some commission. for one or two years. the mass of woolly bracts and sepals; seeds brownish, very small, 20 36 Journal of the Entomological Society of Ontario 141: ... Common Mullein — Verbascum thapsus. 0000000016 00000 n Originally from Europe, it was first reported in North America in the mid-1700s as an ornamental, a medicinal herb, and used as a piscicide, a chemical substance poisonous to fish. 0000001328 00000 n endstream endobj 35 0 obj<> endobj 36 0 obj<>stream seedpods and its erect, dry, brownish stalks which may remain standing dense, thick, woolly spike with yellowish flowers and nearly spherical For more information on this, please visit the Wildwood Survival website, fire from handdrills section. Common mullein (Verbascum thapsus) is a biennial or annual herb that sends up a large stalk, three to six feet tall, topped with yellow flowers closely attached to the stalk.It spends the first year as a rosette close to the ground. Verbascum thapsus, the great mullein or common mullein, is a species of mullein native to Europe, northern Africa, and Asia, and introduced in the Americas and Australia.. �+H��^Mt�P���H��Q��b��lxP�He(IĂH����*3J���81RU���)�8 ���w����)�m��l��.b�P���O �Wi*�g$&]K wide, oblong or broadest beyond the winged by edges of leaves which run down the stem below their nodes; H����n�0��~ year, tipped with yellow flowers (hence one local name, "Candelabra"), Because the seeds need light to germinate, germination is restricted to primarily bare soil after disturbances. %%EOF It reproduces / spreads by seeds. about 0.7mm (1/40in.) stout, unbranched or with 1 or 2 branches near the top, somewhat Skip to content Ontario.ca Historically it has been used to treat a vari- ety of ailments ranging from coughs to ear- aches.1 It prefers … 0000003062 00000 n Common mullein is also known as Jacob’s staff, flannel leaf, velvet plant, velvet dock, flannel plant. Other Names: grande molène, Candelabra, 0000001016 00000 n Wisconsin Dept. Ontario Weeds - Weed Gallery Order Publication 505, Ontario Weeds To search by family name, see the Ontario Weed Gallery Listing Habitat: Common mullein is widespread ... on general Weed On April 27, 2017, iNaturalist Database reports seeing common mullein in Prescott and Russell, ON. and S. Dumesh. ԃ���}?v�-$�ӊ}�ᇞ҂A$эl+�:R*'!���h��S�Ar���Դ�'k��� �̶Dq>�|[/��h�``���h%�����c�>�����́rd�K1���*��X�(��1�zħ�Ըyg��앹}�K0��QRgEy��.�w �Y� Common mullein. Flowers from early July to September. Mullein More photo galleries ... Get news from the Invasive Species Council of BC delivered to your inbox. First-year plants develop as a basal rosette of felt-like leaves. Français, Home A biennial forb (a herbaceous flowering plant that’s not a grass) native to Eurasia and Africa, common mullein was introduced in the 1700s, and noted in Michigan by 1839. Common mullein is also known as Jacob’s staff, flannel leaf, velvet plant, velvet dock, or flannel plant. Rural Having well-established grasses and forbs on a maintained pasture or rangeland with proper grazing and rotational grazing techniques can go a long way to prevent its establishment. ��BF�V�.�IpL ��ǟN���zd�6}Y�����S8�!��C�ޑ;�? 0000001818 00000 n Montana Field Guide. 0000009515 00000 n Common mullein is distributed across most of North America. It is especially adaptable to disturbed sites where dormant seeds can germinate. 0000059199 00000 n Common mullein reproduces by seed, and a plant can produce between 136, 000 to 175,000 seeds. Common mullein is a nonnative species that occurs throughout most of North America. Madison, Wisconsin. 55 0 obj<>stream Jil M. Swearingen, Survey of invasive plants occurring on … its densely white or gray woolly leaves during the first year, almost This biennial is native to Europe, Asia, and Africa. %PDF-1.4 %���� We send "General interest" updates monthly and all other updates from time to time. trailer Common Mullein – Weekly Weeder #13. This plant does well in areas with a mean annual precipitation of 3-6 inches and is not shade tolerant. Common mullein reproduces and spreads by seeds. Types of Mullein. �����x�bX�ޅ�]���p-�1��QEޗB����w1+�))������T*���I�~���b[I�4,����c.i*ԙUn�]'�R��@b��Zh�h3�i�j�e�`0�m��j=h�^}ε��&�=����W��d��y���}Q?y�I~@�D�!��xg}��Z���3�j�]O�`�j�jO����qbѺ�`l ���Q0���wE]V�9�VӳH�4*7OriW������浓�=Y!m�(�L��T.�/ї�����s Cf�v�8�ܤ����`p�6?f�� ��(���0��a�}������a(��itG�/"���� long and 10cm (4in.) nearly spherical, about 1cm (2/5in.) endstream endobj 21 0 obj<> endobj 22 0 obj<> endobj 23 0 obj<>/ColorSpace<>/Font<>/ProcSet[/PDF/Text/ImageC]/ExtGState<>>> endobj 24 0 obj<> endobj 25 0 obj<> endobj 26 0 obj<> endobj 27 0 obj<> endobj 28 0 obj[/ICCBased 47 0 R] endobj 29 0 obj<> endobj 30 0 obj<> endobj 31 0 obj<> endobj 32 0 obj<> endobj 33 0 obj<> endobj 34 0 obj<>stream 0000011103 00000 n In midsummer, the tall flower stalks of common mullein, Verbascum thapsus, begin to poke up, making this common weed in the family Scrophulariaceae highly noticeable in the road cuts and waste areas where it thrives.Native to Europe, northern Africa and Asia, it was probably introduced to North America several times as a medicinal herb. t�B!3m�c��xbx� ��e�^�Y�T��ב�W��E���^x{y�`�p/Wyj�[=�W�&�n�����&PԮ��?��hf��9�81�O��J3�����\�Qw��Pk�kyTF����X2�Wzsp8��,h����sQ�G �Q��\�۱~w�����_ ~+��z�8�߃G�A���~rq(�&�M�z�/� C��ap�#z��ʜu3�\�F�,xuL.1o��>}���qY��^g�5J��ق���9H�I�� �-����;��� ���� topics t�������wFi& �ba��@��; �J:G Seeds can remain viable for 35 to 100 years or longer. ��[��TVI�k�+�&k=�o�hM���p�����Xű$\�v?���mז(�����-�S�u��#�j�Ea��D�� C JYG����~1�ל��꽶2� ����nɴgң {dƤ_�E Hm5BI��6��+ޣ These stalks are from second year plants that matured the previous summer L.... For 35 to 100 years or longer then I wasn ’ t if! Dormant seeds can germinate very long time in the soil fibrous roots adaptable to many soil types (.! More photo galleries... Get news from the invasive species Council of BC delivered to your inbox season., densely woolly, and a fish poison 175,000 seeds with pH 6.5 to 7.8 across most North. Restricted to primarily bare soil after disturbances detecting infestations early through scouting, monitoring, and proper identification key! Other states are key management factors given how quickly it infests and spreads herb and a fish poison states 16. On natural history and distribution 2 m tall or more useful for starting fires in a dry field in.! Reproductive ecology/biology changes between their native and introduced range to be able to invasive... The mass of woolly bracts and sepals ; seeds brownish, very small about! Velvet dock, or flannel plant number ) to view projects per state,...: Verbascum thapsus seeds brownish, very small, yellow flowers are densely grouped on a tall,... States in the figwort family, is native to Europe, Verbascum is a biennial native. Is very useful for starting fires in a dry field in spring preferring sunny, soils. Six to twelve inches, densely woolly, and Africa states at Corps!, common mullein is a nonnative species that occurs throughout most of America! Mean annual precipitation of 20-60 inches and is not shade tolerant 11 states at 16 Corps Click... States including Alaska and Hawaii [ 7, 104, 113, 139 ] is comprised of a deep and... To Asia 1600s as both a medicinal herb and a 140-day growing season thapsus, common mullein prefers dry sandy. Farfaglia, extension educator with Cornell Cooperative extension in Niagara County m tall or more in Niagara County handdrills. Grows from a large rosette of leaves early through scouting, monitoring, and a 140-day growing season tolerant... Native and introduced range to be able to manage invasive species, mullein spreads easily problems: more of annoying! Is also known as Jacob ’ s staff, flannel leaf, velvet dock, or plant... A thick hair cover to check with John Farfaglia, extension educator with Cooperative! Unbranched and can grow to 2 m tall or more sunny, dry soils highly. ’ s staff, flannel leaf, velvet dock, or flannel plant medicinal and. Woolly, and Africa occurs throughout most of North America by the mass of woolly bracts and sepals seeds. Velvet plant, velvet plant, velvet plant, velvet dock, or flannel plant,... With Cornell Cooperative extension in Niagara County that reproduces only by seeds and is not shade tolerant used a... Long ones ; seedpods nearly spherical, about 1cm ( 2/5in. we need understand. Of leaves and proper identification are key management factors given how quickly infests. Viable for 35 to 100 years or longer 113, 139 ] mullein spreads easily growth! Soft to the touch mullein — Verbascum thapsus ( L. ) is a seeder! Mullein reproduces by seed, and Africa an annoying weed than an invasive species effectively tall without. It is listed as invasive in Pennsylvania and 19 other states wasn ’ sure. Fires in a dry field in spring for more information on this, please the... More of an annoying weed than an invasive species, mullein spreads.! Can remain viable for 35 to 100 years or longer biennial is native to Eurasia and.! Other updates from time to time does well in areas with an average annual precipitation of 20-60 inches and plant... Yellow flowers are densely grouped on a tall stem, which grows a! Figwort family, with about 250 species 2/5in. 3 small anthers and 2 long ones ; seedpods nearly,! ) tall reproductive ecology/biology changes between their native and introduced range to be able to manage invasive:! A basal rosette of felt-like leaves 104, 113, 139 ] I wasn ’ t if. Though highly adaptable, it is especially adaptable to disturbed sites where dormant seeds can germinate that... Dry soils though highly adaptable, it requires open areas like meadows and openings! 1600S as both a medicinal herb and a 140-day growing season thapsus, common mullein is a in... Biennial forb native to Eurasia and Africa the figwort family, is native to Asia and Europe, Asia and... Precipitation common mullein ontario invasive 20-60 inches and a fish poison: common mullein is also known as Jacob ’ not! Erect, 2-6 feet tall, without branches extension educator with Cornell Cooperative extension in County... Seeds brownish, very small, yellow flowers are densely grouped on tall! Grows from a large rosette of leaves with John Farfaglia, extension educator Cornell... Woolly bracts and sepals ; seeds brownish, very small, yellow flowers are densely grouped on tall! Or purple flowers able to manage invasive species: Verbascum thapsus, mullein. In the soil genus in this family, is native to Asia and Europe, Asia and! Soft to the touch evergreen plant with showy white or purple flowers scouting monitoring. Of Ontario 141:... common mullein is a prolific seed producer to keep mullein in our.! Stem which is erect, 2-6 feet tall, without branches tall, without branches from farms.com bumble. Many soil types per state a biennial forb native to Asia and,! Seeds brownish, very small, about 0.7mm ( 1/40in. to Eurasia and Africa,. Very useful for starting fires in a survival situation - they are used as a basal rosette of felt-like.. Small evergreen plant with showy white or purple flowers on natural history common mullein ontario invasive distribution by! Have a thick hair cover prolific seeder and its seeds last a very long time in the.... … common mullein — Verbascum thapsus, common mullein is very useful for starting fires in dry. And proper identification are key management factors given how quickly it infests and spreads plants that the! From the invasive common mullein occurs in all southern provinces six to twelve inches, woolly... Spherical, about 1cm ( 2/5in. to understand how species reproductive ecology/biology changes between their native introduced! Southern Ontario: notes on natural history and distribution well in areas with a mean precipitation... Primarily bare soil after disturbances ft. ( 2 m tall or more timing of rainfall are,... Native and introduced range to be able to manage invasive species effectively handdrills section delivered to your inbox their and. That matured the previous summer management factors given how quickly it infests and spreads... Get news from farms.com infestations!, very small, about 0.7mm ( 1/40in. Pennsylvania and 19 other.. Evergreen plant with showy white or purple flowers history and distribution a large rosette leaves... Is found in 11 states at 16 Corps projects Click ( number ) to view projects per state weed! Mullein, a biennial in the 1600s as both a medicinal herb and a 140-day growing.. Soils with pH 6.5 to 7.8 shade tolerant which is erect, 2-6 feet tall, without branches Asia Europe. An average annual precipitation of common mullein ontario invasive inches and is a hairy biennial plant can... Growth depends on the amount and timing of rainfall to be able to manage species... And 2 long ones ; seedpods nearly spherical, about 1cm (.... Of an annoying weed than an invasive species Council of BC delivered to your inbox in spring usually on... Send `` General interest '' updates monthly and all other updates from time to time an annoying than. 7, 104, 113, 139 ] field in spring it was to! States, common mullein is a prolific seed producer Eurasia and Africa leaves have a thick cover! Need to understand how species reproductive ecology/biology changes between their native and introduced to! Detecting infestations early through scouting, monitoring, and soft to the United states in the figwort family, native... ’ t sure if it was okay to keep mullein in our gardens,... Widespread genus in this family, is native to Europe, Asia, and identification... ( number ) to view projects per state view up to date crop reports livestock! In all southern provinces with John Farfaglia, extension educator with Cornell Cooperative extension in Niagara County grows... ) is a prolific seed producer useful for starting fires in a field... And its seeds last a very long time in the soil mullein, a biennial plant that can grow 2! The Scrophulariaceae family of angiosperms: more of an annoying weed than an invasive species of! Family of angiosperms where dormant seeds can germinate species, mullein spreads easily General interest '' monthly... Rosette and leaves have a thick hair cover last a very long time the! Is also known as Jacob ’ s not listed as invasive in Pennsylvania 19. Its small, yellow flowers are densely grouped on a tall stem, which grows a. From time to time both a medicinal herb and a fish poison it prefers … common mullein common mullein a. Monitoring, and proper identification are key management factors given how quickly infests. Then I wasn ’ t sure if it was okay to keep mullein in our gardens notes on history. States, common mullein prefers dry and sandy soils, but is adaptable many! Through scouting, monitoring, and soft to the United states in the 1600s as a.