You should divide these perennials in late summer

You should divide these perennials in late summer

Perennials — plants that come back year after year — are always worth the investment. But you can save even more on that investment by simply dividing up the plants you already have in your garden: In many cases, you can just separate some existing plants, roots and all, and put them in another part of the yard to spread the perennial wealth around.

Divide these perennials in late summer

Here are plants you can divide now during late summer.

Iris masses

Those beautiful ringed statues indeed Need You have to separate them because they will crowd each other out. That’s why you see so many people donating their iris this time of year. In fact, if you don’t have an Iris, go to the usual second-hand sites (Craigslist, Nextdoor, Facebook Marketplace) to get one. Iris is a rhizome – it is very similar to ginger root. These roots are planted near the surface of the soil with shallow roots, but can a person take root in them?

To split the iris, you can use a Hori Hori, which has a sharp serrated edge and try to free up some of it. For larger blocks, you can try digging around with a shovel and hope to break a bunch of them. However, my trick is to grab a bread knife – any serrated knife – and get into the dirt and spread out the tubers. You don’t have to plant it again right away; You have a few days, but don’t let them dry out too much before planting.


Daylilies, oriental lilies and Asiatic lilies will always produce more bulbs. But these bulbs will produce smaller and smaller flowers each year unless they are updated. You need to dig them up and replant them to get them to form new roots so they can produce better flowers. To do this, go carefully using a spade or hand trowel. Loosen the soil on the roots and then try to break up the soil into which the bulb will grow again. Add some bulb food or fertilizer, then bury the bulbs under the soil.

How deep to plant the bulb depends on its size. If the bulb is one inch in circumference, plant it one inch deep. If it’s a 3-inch bulb, plant it 3 inches deep, etc. It’s important for bulbs to be exposed to the cold of winter, so refreshing them in September or October is key. And remember: lilies are toxic to cats, so make sure you plant them where cats can’t reach them.


This gorgeous piece can be divided in August, so you’ll see more of these delicate flowers next year. When you have a large enough clump, you will simply use the shovel to break off part of the plant by pushing it directly into the root ball. The resulting mass of roots and dirt should be planted immediately, dirt and all, disturbing the roots as little as possible. Be sure to water it into the seedling, replacing the dirt around the original plant. Give both plants a little shade for a few days to recover.


People who have these scented drops of heaven in their yard know what they’re sitting on. Your peony will produce a few new flowers each year, but it will take a few years for the new plant to really take hold. You can divide your peonies by taking at least a few eyes from the peony and dividing them using your space as described above. Be sure to plant these new roots at the same depth as the plant they came from, and be sure to water them well. The time investment is worth it, as peonies in the middle of the garden are expensive.

Yarrow plants

A pollinator’s dream, this tall yellow flower has recently appeared in gorgeous shades of red and pink, filling the garden with butterflies, birds and bees. However, yarrow is a dictator that can take over a space. You should never grow yarrow from seed; Instead, take them out of someone else’s hands when they split. If you have a yarrow plant, be sure to get in there and divide it annually with a spade through the root ball and donate or propagate it.

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