This week

- Divide hardy chrysanthemums as soon as they’ve emerged enough to be seen. Discard any old, woody centers, and be sure that each division has some healthy roots.

- Get those peony hoops in place now – it’s a lot easier than when the peonies are fully leafed.

- Clean out nonvining ground covers, such as lamb’s ear, bishop’s weed or ajuga, by raking. It won’t hurt these vigorous plants if a bit of new growth here and there is accidentally raked out.

This month

- When planting new trees and shrubs, there may be temptation to amend the soil. But that’s usually not a good idea, even in poor soil. It will only create a “basin” of good soil, and the tree’s roots may circle in the better soil. Instead, dig a larger hole than the new plant needs to loosen the soil, and refill with the original soil. Set the tree in the hole, so that the trunk flare can be seen where it meets the roots.

- Clean up trenched bed edges now, with an edger or a sharp spade, before plants are big enough to get in the way.

- Set up a cold frame. Seedlings can start to spend time outside, if they’re protected – and it’s warm enough. Make sure they’re out of the wind, and check the soil often, as they’ll dry more quickly outside. On sunny days, lift the lid on the cold frame so the little plants don’t cook.

source : desmoinesregister.com