Stipa tenuissima is an evergreen grass and they often dont like being cut back. This stipa will shoot up very quickly after being cut back, almost overnight, but will then sulk and may die. Its better with evergreen grasses to run gloved hands thru them to try to pull out the dead bits, rather than chopping themdown.
Hi, Jan, Where do you live? I had to cut mine (I live in Southern California) because they were shedding their seeds everywhere and crowding other plants. Here, though, they will sprout and fill out again in a few months. I do need to divide mine this autumn as they are starting to rot in the middle (they form thick clumps here - when I lived in England, they never got this wide of a clump!). They really need dividing every year, every two at the most. Kathy C
I planted some of these grasses last year but didn't cut them down in the autumn or winter. They have been a lovely edition to the garden but are now too tall and are hiding other plants. Can I trim them now.
Posted: Tuesday 19th of June 2012 06:52 PM Last reply: Friday 28th of February 2025 09:10 PM
I would think they will be fine, in a well sunny border with drained soil and perhaps some protection with a netting cloche to prevent them dry drying out in cold wind. You could pot them on and put in a cold frame and plant out in spring, remembering to water occasionally. All depends if your garden will be sheltered enough going into winter. Patricia
Hi, it's mid-Sept and I've just received some 15cm stipa tenuissima seedlings. Can I put them in the ground now or will the winter cold kill them off at this stage in their development?
Posted: Tuesday 20th of September 2011 05:56 PM Last reply: Friday 28th of February 2025 10:08 PM
Hi, Jackie, Best time to cut back S. tenuissima is after the leaves have died, either in late autumn or early winter. However, if you live in an area with mild winters, the leaves may not die down at all. Have you added this to your 'Plants I Have' list? You'll get all the details on what to do with it and when. Kathy C