Some ornamental grasses look better if they are not cut back, namely Mexican Feather grass.Patrick’s Day is a good date to do so.Ĭut grasses back to 1/5th of their full height If you are starting seeds indoors for warm weather vegetables, herbs or flowers, St.Consult sources such as NOAA to find the last frost date for your area. The rule of thumb for planting new plants in the Denver area (and other Front Range communities) is to wait until Mother’s Day (middle of May) to plant new bedding plants.The average last frost date in the Denver area is May 5th.Many shrubs and perennials are only just beginning to emerge. In Colorado, we generally get plenty of moisture in March and April so lawns do not generally need supplemental water yet, and it will go to waste. Resist the temptation to start your sprinklers before May 1st. Early May: Time to start up that irrigation system.March to April: Cut back perennials and grasses. ![]() Now that spring is here, among other things you will need to clean your beds of those leftover leaves, and cut back your perennials and grasses. Keeping a less tidy landscape over the winter is good for the health of the plants, and good for small wildlife like insects and birds. If you read our Fall landscape maintenance tips, you know that we are not a proponents of keeping the landscape perfectly tidy over the winter. This article is intended to give a simple, easy to follow guide covering the most important spring landscape maintenance tasks. “Spring Clean-Up” includes the spring landscape maintenance tasks that are vital for a healthy and attractive landscape, especially for Xeriscape. We wanted to revisit that post and make some minor updates and add some extra information. As Spring has arrived once more, we here at Outdoor Design Group have been thinking back to a past post we published, that ruminated on the importance of the annual Spring garden clean-up.
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