FEATURE — April showers bring May flowers — as well as a plethora of gardening tasks.
Utah State University Extension’s Gardener’s Almanac provides a checklist for each month as well as links for tips and other helpful information. Here’s May’s checklist for Southern Utah’s gardeners:
- Plant warm-season vegetables and annual flowers once the threat of the last frost has passed.
- By planting tomatoes deeper, they are able to form more roots along the stem, creating a more vigorous plant.
- Consider planting sweet corn in the garden every other week (until early July) to extend the harvest.
- Consider the various types of fertilizers.
- Thin out overcrowded seedlings using a pair of scissors, trying to avoid disturbing the young roots.
- Protect fruit blossoms and tender garden plants from late freezing temperatures.
- Plant summer-blooming bulbs including gladiola, begonia, dahlia and canna.
- Divide warm-season ornamental grasses when new growth begins to emerge.
- It’s already time to take notice of weeds.
- Allow the foliage of spring blooming bulbs (tulips, daffodils and crocus) to die down before cutting the leaves off.
- Now’s a good time to consider your options for planting a lawn.
- Turfgrass needs minimal irrigation each week.
- In compacted sites, aerate with hollow core aerator when turfgrass is actively growing (April – June).
- Control broadleaf weeds in the lawn when temperatures are between 60 and 80 degrees. Follow the label and stop use of broadleaf herbicides once the temperature is above 85 degrees.
- Apply a slow-release lawn fertilizer to provide a long-lasting effect throughout the summer months.
Pests and problems
- Monitor newly planted vegetables for cutworm and flea beetle
- Monitor for cankerworm damage on scrub oak and Box Elder trees along the foothills.
- Monitor for aphids on lush new spring growth on a variety of plants. Treat for aphids by using “softer” solutions such as spraying them with a hard stream of water or by using an insecticidal soap.
- Monitor for slugs and snails. These pests thrive in moist, cool areas of the garden and landscape, feeding on a variety of plant hosts.
- Protect Ash trees from the lilac-ash borer around the first of May
- Control codling moth in apples and pears to reduce wormy fruit. For specific timing, see the Utah Pests Advisories.
- Treat for powdery mildew on apples beginning when leaves are emerging (at ½-inch green) until June.
- Watch for insect pests in raspberries from mid-May thru early June.
- Watch for cutworm damage in turfgrass and new vegetable starts.
- Monitor for damaging turfgrass insects. In areas previously damaged, consider a preventative (systemic) insecticide.
USU’s Gardener’s Almanac provides monthly tips like these delivered to your inbox year-round. Click here to subscribe.
Written by UTAH STATE UNIVERSITY EXTENSION.