May Gardening Tips

  • Finish planting the garden and put down a good mulch layer for weed control.
  • Thin the apples and peaches to one fruit every 5 to 6 inches.
  • Plant annuals once the danger of frost is past.
  • Fertilize annuals about two weeks after planting to stimulate growth.
  • Fertilize the lawn with a high-nitrogen fertilizer and broadleaf weed killer to turf grass.
  • Water lawn 1 to ½ inches per week.
  • Control broadleaf weeds in the lawn with a 2,4-D product before temperatures are above 85 degrees.
  • Spray birch trees to control the bronze birch borer, and ash trees for ash borer.
  • Call your local USU Extension Office for the date to begin spraying apple and pear trees to control codling moths and prevent worms in the fruit.
  • Use mulch or a pre-emergent herbicide to prevent weeds in the garden.
  • Clean sprinkler heads and check for good water coverage.
  • Start planting tender plants such as celery, cucumber, dry bean, snap bean, spinach, summer squash, sweet corn.
  • Check USU Pest Advisory to get a head start on controlling garden pests.
  • Plant your beautiful new perennial and annual flowers.
  • Treat perennial plants with compost or slow-release fertilizer.
  • Prune spring blooming shrubs after they finish blooming.
  • Apply chelated iron to plants suffering from iron chlorosis.  
  • Enjoy a sit in the flowerbed to deadhead spring perennials and dig annual weeds.
  • Become a member of the gardens!
  • End of may, begin planting very tender plants such as cantaloupe, eggplant, lima bean, pepper, pumpkin, tomato, watermelon and winter squash.