The botanical name comes from the Latin word "altheo," which means "to cure," because some hollyhocks have medicinal properties. Hollyhocks (Alcea rosea) tower majestically at the back of a flowerbed on 4- to 5-foot stalks that bear 3- to 6-inch flowers in shades of white to pink to purple, and even yellow hues. The leaves are large at the base of the plant with a shape resembling a heart. This is a relative to a hollyhock, smaller and I … https://homeguides.sfgate.com/propagation-hollyhock-22273.html CapCarl says. Hollyhocks do best with morning or filtered afternoon sun. A self-seeding plant, hollyhocks happily reproduce, and spread, if spent flowers are allowed to go to seed. Ferns, on the other hand, spread via spores but they do so most sparingly. Each flower lasts only a few days, but the season of bloom can be from four weeks to three months long. Hollyhock mallow can reach 4 feet in height with a spread of about 1 foot. You’ll already see the first orange pustules that will soon spread all over the leaves! Fortunately, even if plants of rust-resistant hollyhocks are rarely seen in garden centers, seeds of the “good hollyhocks” are commonly available in seed catalogs, both printed and virtual. They form foliage the first year and don't produce flowers until the second year. I do have a recipe for spray to keep the rust off but in NM the air is so dry and since I cut them back I don't use it! Hollyhocks are really easy and like no special treatments. Hollyhocks are the epitome of cottage garden plants. Hollyhock. This means that the flowers shrivel up and turn brown. Insight. The old-fashioned hollyhocks are hardy perennials but they are short-lived. They’re offering you a pre-diseased plant! Excessive humidity or dampness encourages the spread of hollyhock rust among the plants. Short-lived, yet beautiful and impressive, hollyhocks are one of the easiest flowers you can grow. In my yard, the hollyhocks that do best are on a north-facing wall. I have many and wish they would more easily self propogate. The flowering hollyhock has large, lobed leaves that are subject to a fungal disease called hollyhock rust and to insect infestation. Chances are you’ve seen them alongside a barn, in front of a cute cottage-style house, or gracing the front of a white picket fence. The easiest way to propagate hollyhocks is from seed. They are also usually planted as a backdrop to other lower growing flowers so may be against a fence. Not only do they spread rapidly, but they are not high maintenance at all! 28. Hollyhocks bloom from April through June or July. Hollyhocks are traditionally planted in large clusters and left to spread on their own, which they will readily do. Hollyhocks only live for two or three years but are masters of reseeding themselves. Reply. I think they may not bloom as well if you fertilize them or over water? 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