Western Mountains and High Plains
Core Aerate the Yard
Aerate the lawn to improve the vigor and general health of turf grasses. Removing the plugs of soil will help keep the holes open a bit longer and avoid anyone tracking in mud balls. Fertilizer will filter down to the roots, and more air and water will improve root development.
Plant Cool-Season Vegetables
Spring is the time to plant cool-season vegetables including leaf lettuce, spinach, peas, broccoli, Brussels sprouts, cabbage, cauliflower, onions, asparagus, and potatoes. It's important to amend the soil with a quality compost prior to planting.
Be Patient With Heat-Loving Vegetables
Warm-season vegetables, such as cucumbers, melons, squash, tomatoes, beans, peppers, and eggplant, are safely planted after the last frost in spring (generally May 10 in metro Denver). Allow the soil to warm up or use plant protectors and row covers to provide frost protection.
Remove Tree Wrap
Remove the tree wrap from the trunks of trees in mid to late April. If you forget and leave the wrap on, insect pests and diseases can become a problem. Pests like to hide and feed under the protection of the wrapping.
Plant Bulbs for Summer Color and Interest
Plant summer-flowering bulbs in mid April. Set out groups of gladiolus bulbs two weeks apart to stagger blooming times. Prepare the soil with compost and sphagnum peat moss to improve drainage and make nutrients available.