Keep the soil evenly moist until the seeds germinate in 10 - 20 days. Annual vs. perennial – if the milkweed you are growing performs as an annual in your hardiness zone, like the Asclepias Physocarpa pictured above, you can scatter the open seed pods around the soil and cut the stalks down to the ground.The roots will dissolve over time and new plants will grow from dispersed seeds. The milkweed is 12-16 inches tall. Narrowleaf milkweed or Mexican whorled milkweed is a flowering perennial sending up many thin, erect stems and bearing distinctive long pointed leaves which are very narrow and often whorled about the stem, giving the plant its common names. Asclepias Incarnata (Swamp Milkweed) This is probably the best option if you want to stick with natives varieties. The delicate white/pink blooms are amazing. Narrow leaf milkweed is a robust perennial native to many habitats and conditions across all of California. This subshrub grows about 2-4′ tall. Plant seeds 1/8" deep and 18” apart, using 3 seeds per hole. Asclepias fascicularis (Narrow Leaf Milkweed) and Asclepias speciosa (Showy Milkweed) grow well in virtually all of the Bay Area, in sun to part-shade conditions. SUN Full. For instance, plants in the milkweed family, Asclepiadaceae, (don't let the name intimidate you), secrete a milky sap (except for Butterfly Milkweed) and opposite or sometimes whorled leaves. Due to loss of habitat and other environmental factors, monarch butterflies have been in decline. I used a narrow soil knife to dig holes for my seedlings. Nonetheless, there still may be an issue. SOIL TYPE Sandy, Clay, Rocky. Once the seedlings reach 1", thin out so you have individual plants spaced 18” apart. Eating and Growing How much milkweed do larvae eat and how quickly do they grow? Butterfly milkweed (A. tuberosa) germination increased from 29 to 48 to 62% as stratification duration increased from 0 to 30 to 60 days, respectively (Bir, 1986). Asclepias fascicularis (Narrow-Leaf Milkweed) is a perennial herb up to 9 feet tall; dry clay to loam soils, winter dormant. The invertebrate conservation group The Xerces Society recommends native milkweed species. They are currently being considered for listing under the Endangered Species Act. Drought tolerant, prefers moderate water. Grows as a subshrub about 2' … Plants are less showy than other species, but the white flowers pair well with other more colorful milkweeds. The flowers are also highly variable but are overall a … Narrow-leaf milkweed, sometimes called Mexican whorled milkweed, is a California native flower that is a preferred food source for monarch butterflies. The invertebrate conservation group The Xerces Society recommends native milkweed species. Narrow-leaf milkweed occurs on dry ground and sunny spots in valleys and foothills at elevations from 50 to 220 m. The range extends through California to Washington, Utah and Baja California. Add a couple of colourful cushions. Narrow-leaf milkweed, sometimes called Mexican whorled milkweed, is a California native flower that is a preferred food source for monarch butterflies. The leaves are narrow and grow in a whorled pattern on stems that reach from 2-3′ tall. Our informal natura l stratification trial with showy (milkweed) and narrow leaf milkweed (A. fascicularis) in southern Oregon revealed that seeds began to germinate after Last winter we purchased five one-gallon pots of narrow-leaf milkweed (Asclepias fascicularis) from CNPS East Bay’s Native Here Nursery (NHN) in Tilden Regional Park and planted a milkweed patch in our back garden.This June we found three small monarch butterfly caterpillars on the milkweed, but they had attracted a number of predatory paper wasps. PLANT TYPE Perennial. Zone 6 - 10 Upright stems with narrow, light green leaves. Is this true and do I have to dig them all up and lay down new soil. This section is a work in progress because there are so few North American “gardening” reports about this milkweed species. Asclepias fascicularis is a flowering perennial sending up many thin, erect stems and bearing distinctive long pointed leaves which are very narrow and often whorled about the stem, giving the plant its common names. I was so happy to have gotten these seeds to grow for my Monarchs. Learn how to plant milkweed, get care tips and recommendations for which types to grow. I pick the leaves off but it still goes to the next leaves up the plant. It is a virtually carefree perennial that has light green narrow leaves on 3' stalks, with clusters of pinkish white flowers in summer. Our neighbor Michelle provided the seedlings which she had grown, a couple packets of Milkweed seeds, and flyers about how to grow Milkweed for Monarchs. This means that growers in mild climates might notice a lower seed germination rate. Zones: 6-10 A note about seed balls: Seed balls protect the seeds from erosion, foraging, and many other factors. milkweed alone or with other nonaggressive species, rather than in a seed mix with commonly grown nectar plants. milkweed plant make the monarch caterpillar's flesh distasteful to most predators. Growing Instructions: Start Narrowleaf Milkweed seeds outdoors in the spring after the danger of nighttime freezing has past. They are currently being considered for listing under the Endangered Species Act. Narrowleaf Milkweed is an herbaceous perennial that dies back to the root each fall-winter. Check out our Southwest Wildflower mix! Sadly, I found out too late we're not supposed to plant milkweed too close to the California Coast as it can disrupt Monarch migration, so decided to grow them in individual pots to pass out to friends and family that live more inland. Cut back the entire plant by one-third to one-half its previous height in late winter or early spring before new growth emerges. Blunt-leaf milkweed Asclepias amplexicaulis 6 ... Herbaceous perennials growing to 8 dm or more tall; leaves opposite, petiolate, densely tomentulose, ... Herbaceous perennials; stem to 9 dm; leaves narrow, pointed at tip, and 13-15 cm long; flowers very showy with yellow/orange corona and bright red The flowers also supply nectar for butterflies and hummingbirds. Map ©: Kartesz, J.T. Narrow-leaved milkweed is an important host plant for many native pollinators including monarch, swallowtail, and striated queen butterflies, beetles, wasps, and bees. Growing Requirements: Narrow-leaf milkweed is not fussy! The Troop members live in San Carlos, CA. At the winter plant sale this last weekend, one of the most frequent requests from customers was for milkweed plants. They will … Milkweed species grow throughout the United States. Prefers wet ground. Family Apocynaceae . Clump of Narrowleaf Milkweed. FLOWER SEASON Summer. How to Grow Asclepias Plants in your Garden Gardener's HQ Guide to Growing Milkweed, Pleurisy Root, and Butterfly weed. Narrow-leaf milkweed occurs on dry ground and sunny spots in valleys and foothills at elevations from 50 to 220 m. The range extends through California to Washington, Utah and Baja California. I read it was a fungus from the dirt. It will grow in most garden conditions including clay. Culture. Powered by BigCommerce. The plant is quite drought tolerant and prefers somewhat dry, poor soils. Floristic Synthesis of North America, Version 1.0. Tropical Milkweed (Asclepias curassavica) Tropical milkweed is an annual plant that is no native to the US (Woodson, 1954). Feed the Monarchs! Due to loss of habitat and other environmental factors, monarch butterflies have been in decline. I’ve seen it along the coast in Santa Barbra, along highway 5 from Bakersfield all the way to Seattle and outside the entrance of Yosemite at over 6,000 feet. A host plant for Monarch populations on the West Coast and Great Basin, this ornamental species is easy to grow and thrives in a wide range of growing conditions. Description. This perennial will grow in most soil conditions from clay to silt and even disturbed grounds. Narrow Leaved Milkweed - Asclepias fascicularis a perennial, is one of four species of Milkweed found in the Santa Monica Mountains, grows in grassland habitats and flowers from late May into the first days of Fall. Go to a garden centre and get some planting pouches. Narrow leaf milkweed will grow to heights of 3-4 ft. and produce green linear leaves during the spring season following winter rains. And once the plants are established, they do not need to be watered. Growing milkweed supplies larvae of the Monarch with food and shelter, providing caterpillars food and a resting place before they leave the caterpillar stage and become butterflies. To get a head start, seeds can be planted indoors in the late winter. © Copyright San Diego Seed Company | All Rights Reserved |, Growing Vegetables in Southern California: Microclimates. It requires full sun. Keep the soil evenly moist until the seeds germinate in 10 - 20 days. Growing Requirements: Narrow-leaf milkweed is not fussy! 2013. For instance, plants in the milkweed family, Asclepiadaceae, (don't let the name intimidate you), secrete a milky sap (except for Butterfly Milkweed) and opposite or sometimes whorled leaves. When starting your seeds or seedling, keep the soil moist until the plant is fully established and then cut watering back to an as-needed basis. Plant seeds 1/8" deep and 18” apart, using 3 seeds per hole. Transplant outdoors after the danger of nighttime freezing has past. Direct seeding or transplanting are both acceptable ways to start the seed. Soil PH: 6.0 - 8.0. Narrow Leaved Milkweed - Asclepias fascicularis a perennial, is one of four species of Milkweed found in the Santa Monica Mountains, grows in grassland habitats and flowers from late May into the first days of Fall. Narrow-leaf milkweed evolved in California so it is a generally drought tolerant plant. Establishment Seed … Our informal natura l stratification trial with showy (milkweed) and narrow leaf milkweed (A. fascicularis) in southern Oregon revealed that seeds began to germinate after ( Swamp milkweed ) is a host plant but the narrow leaves stems... It will grow in most garden conditions including clay and grow in most conditions... That species centre and get some planting pouches, or pink narrow-leaf milkweed is easy to grow for monarchs! With natives varieties are piggy little eaters and will devour most of your plant... 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