Plant bulbs, trees and shrubs. There is still time to plant trees and shrubs as long as the weather is not too warm, so aim for earlier in the month if this is on your to-do list. These larger landscape plants can, theoretically, be planted during warmer months, but you will have to tend to them much more closely as they acclimate. Bulbs like elephant's ear, cannas, caladiums, daylilies and irises can be planted now for lush summer foliage.