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Setaria palmifolia



A broad leaved tropical grass that will grow to 2m in a suitable climate - it has only managed a quarter of that here. I grow it in the greenhouse and it just survives (so far). It gets damaged in winter but recovers slowly as temperatures rise.
I was told that it will seed about and I am a little nervous of introducing another weed into the greenhouse but I think I have overestimated the risk.
I was never really overwhelmed by its charms. It produced a few seedlings about the place but eventually showed that it was prepared to die out in the hedychium house. I discovered that I was prepared to let it.

Plants of the World online says:

"The native range of this species is Tropical & Subtropical Asia to E. Australia. It is a perennial and grows primarily in the wet tropical biome. It is used as animal food and a medicine, has environmental uses and social uses and for food."

The Big Plant Nursery say:

"Setaria palmifolia often known as the ‘Palm Grass’ is exactly as the common name describes a very exotic looking grass that does indeed look like a bushy long leafed palm. Growing widely around the warmer parts of the world this semi evergreen grass is usually considered as half hardy at best being generally grown as a house or conservatory plant. What we have here is a bit of a surprise as this particular form ‘CHB 2017’ is showing remarkable adaptability to cooler climes and looks set to be a big favourite here in the U.K to lovers of jungly large leafed plants. We have trialed it outside in our soggy West Sussex clay for the past 2 winters and are happy to report it has survived both, Ok in a sheltered spot but we consider this fairly amazing for such a tropical looking plant. Our plant has reached about a metre high being quiet bushy too, the leaves brown during frost with just the base of the plant remaining green. New growth emerges in late spring with growth being rapid during the warmer months. In warm conditions it can reach 2 metres high and almost as much wide."






In a note in the J. C. Raulston Arboretum Newsletter, Douglas Ruhren says:

"Perhaps I'll rave about one more plant. Palm grass, Setaria palmifolia, has beautiful, pleated, crepe paper textured leaves. They are surprisingly broad for a true grass; about 3" wide by 6-8" long. The form we grow has purple stems and green leaves and rarely blooms early enough to bloom out fully before frost. The variegated clone has a slight white margin which does not detract from the sumptuous texture of the leaf blade. Propagate this by stem cuttings, often smaller side shoots come already equipped with roots."

Writing about Hall Farm Nursery in 2000, Roy Lancaster says:

"Sun and warmth are essential requirements of Setaria palmifolia, described by Christine as a superb grass for a subtropical look. I had not come across this species before and was immediately attracted to the beautifully pleated leaves that posess more than a hint of Bletilla - though its common name (palm grass) suggests other affinities. It is native to tropical Asia where it produces stout, leafy stems to 3m (10ft) tall and bold inflorescences. In Britain it requires winter protection and is best treated as a grass for summer effect only outside, either grown in a pot or lifted before the first frosts."






References:
  • Ruhren, Douglas - 'Tender Perennials part.2' , J.C.Raulston Arboretum Newsletter, Vol.4, No.1 (1999)
  • Lancaster, Roy - 'Hall Farm Nursery' , Journal of the Royal Horticultural Society, Vol.125, No.8 (2000)
  • Plants of the World online, https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:421711-1 , accessed 06.04.2025.
  • The Big Plant Nursery, https://www.bigplantnursery.co.uk/shop/plants/flowers-and-grasses/setaria-palmifolia-chb-2017/ , accessed 06.04.2025.