![]() So far they are not invasive but with a new underground irrigation system they may start to spread. Now all three are doing great, they bloom in the spring die back in late summer and come back up for the fall and winter. One was divided and put next to the other. They are growing in red clay loam soil that is full of cobbles in my shady wooded front yard. On Nov 5, 2013, worth1 from Bastrop, TX wrote: Put this plant in a pot if you must have it. The wildlife will be grateful, and so will you. I can't stress this enough - use native plants, not Asiatic exotics, whenever you can. The plant does not respond to RoundUp and requires multiple digging to get the roots. ![]() We were able to dig out the Lenten Roses to transplant and give away and then proceed to TRY to dig out the acanthus roots. We inherited a front bed filled with acanthus and hellebore. Yet another highly invasive Asiatic plant that does not belong in your garden. On Apr 14, 2015, RSSM from Durham, NC (Zone 7b) wrote: read more ds appears to keep it where you want it to be. Not for everyone, but removal of near mature see. I have had no need to remove a mature plant, but appreciate the comments about root "cuttings" from this deeply rooted plant. In friable soil even 2 year old volunteers are easily removed. If you fail to do so, and the next year see new unwanted plants, they are easily removed by digging them out completely, noting the comments about root cuttings. My observations indicate that as long as the flowers are dead-headed before they throw (yes throw) seeds they will stay where they are supposed to. There have been well deserved complaints about this plant going everywhere. I have grown acanthus mollis for several years during which time original plants have enlarged and now enjoy a 2 - 3' footprint. I plan to try it in another exposure on my property because I want it to get BIGGER and BLOOM. After 10 years in the new climate (part shade, zone 7b) I have noticed a pup that came up. INVASIVE? If yours are they must be living in the premium environment for them because the parent in CA (Zone 8) and the cutting I planted here have never become invasive. SIZE: Mine in California was 3.5 feet high and the bloom stalks were over 5 ft! Now after 10 years here in Alabama it is a diminutive plant that has never boomed and is about 1.5 to 2 feet max.Ĥ. read more plant as some have commiserated.ģ. (CA to AL) It was HOT then but I just kept them mulched and moist. I gathered my root cutting in July and planted it as soon as I got to our new home. Don't forget to use a fixative to make the herbicide stick to the leaves! A little bit of dish soap: 1 tbs to a gallon of your mixture. You may need a second application in spring. the roundup will be pulled down to the tubers then. The plants are actively pulling down and getting ready for sleep. If the growing plants go dormant were you live then the best time to use an herbicide (RU) on them would be in the late summer or early fall. ![]() I have seen several comments/questions here that were never answered.ġ. On Apr 12, 2018, pixilated from Hazel Green, AL (Zone 7a) wrote: read more potted one up for him that we'll keep in a solid bottomed pot, and I'll cut off flower stalks before they seed. Last weekend I cut the sprouting leaves and sprayed the cuts with Poison Ivy Round Up in the hopes that will work. I am continuing to pull up the roots, but any small piece left behind becomes a new plant. As others have noted, RoundUp, even the poison ivy strength, is futile. Then we needed to take out the white pines, before all of them fell down, and the acanthus began its takeover.Īt first I tried to limit the plant to a small area, taking out just a few of them, but those ropey rubbery long roots go everywhere, and plants began popping up yards away from the Mother Plant. 2 varieties died out and one remained, slowly growing and spreading. We planted 3 varieties under some white pines about 10 or more years ago. On Aug 31, 2021, maryann5675 from Charlottesville, VA wrote: This plant is said to grow outdoors in the following regions: Seed does not store well sow as soon as possible Regional Plant has spines or sharp edges use extreme caution when handling Bloom Color:īy dividing the rootball Seed Collecting: USDA Zone 9a: to -6.6 ☌ (20 ☏) Where to Grow: Drought-tolerant suitable for xeriscaping Sun Exposure:
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