Monthly Gardening Tips

April 2021


  • Water lawns, gardens, trees and shrubs once to twice a week depending on temperatures, spring wind and snow/rainfall.
  • Inspect your sprinkler systems to make sure they are in good working order.
  • Water annuals, perennials, etc. in containers twice weekly depending on container size.
  • Remember that new plantings will require more water the first year!


  • Apply a good fertilizer on trees and shrubs, if not done in previous months.
  • Fertilize cool-season lawns such as parkblend and bluegrass with a good fertilizer.
  • Fertilize warm-season lawns such as buffalo, bermuda and grama with a good warm-season lawn fertilizer in late April or early May.
  • Fertilize houseplants with a good water-soluble fertilizer. Be sure not to over-fertilize or over-water houseplants, and never fertilize a sick plant
  • Start improving your garden soil by mixing in organic material such as compost.
  • Fertilize established roses with a good rose food.
  • Fertilize container gardens with a high phosphorus blooming formula fertilizer.
  • Fertilize vegetables with a good organic vegetable food.

Yard and Garden

  • Plant shade trees such as ash, elm, sycamore and cottonwood for cooling shade in the hot summer.
  • Plant ornamental trees such as flowering plums and crabapples for their gorgeous flowers in spring.
  • Plant fruit trees such as apple, cherry, pear, plum, apricot and pomegranate for delicious fruit for many years to come.
  • Plant flowering annuals and perennials in your garden for wonderful flowering all summer.
  • Plant up or refresh your containers with annuals, herbs, perennials or small shrubs. Remember the saying “Thriller, filler, spiller!”
  • Plant natives for a beautiful low-water xeric landscape.
  • Plant ornamental grasses for a spectacular show in the fall.
  • Plant your summer bulbs such as dahlia, canna, gladiolus and lilies.
  • Plant roses for their sheer beauty.
  • Prune established roses in early spring.
  • Lay a cool-season sod or seed a new lawn.
  • Annual flowers such as sunflowers, cosmos, zinnias or morning glories can be directly sown in the garden. You can also seed perennial wildflower mixes!
  • Remove spent flowers from roses and flowering plants to promote repeat flowering.
  • Refresh mulches as needed.

Insects And Diseases

  • Clean your garden area by removing debris to prevent unwanted over-wintering pests. Watch out for butterfly cocoons! Refresh with a fresh layer of cypress, cedar or pecan mulch.
  • Look out for early aphids and eliminate as necessary.
  • Bring samples of insects or damaged plants in plastic bags to our pharmacy for solutions to problem areas. (We can also identify plants for you!)
  • Inspect roses and other foliage for powdery mildew and other diseases.
  • Apply chelated iron (or soil acidifier with iron) to chlorosis-prone trees and shrubs such as chitalpa, maples, aspens, willows, euonymus and photinia.
  • Apply a good systemic to trees and shrubs for yearlong protection from insects.
  • Kill early weeds with a good weed killer.
  • Apply pre-emergent to gardens and lawns to prevent seed germination.


  • Plant warm-season vegetables such as tomatoes, peppers, beans, cucumbers, squash and melons.
  • Improve soil in vegetable beds by adding BTE or home compost.
  • Continue planting seeds for the upcoming summer season!
  • Plant onion sets, strawberries, rhubarb and asparagus.
  • Plant herbs such as basil, rosemary and tarragon. Clean up wintered herbs and cut back 1/3 to ½ for healthy new growth.
  • Plant vegetables in successive planting so that you have continuous harvesting throughout the growing season.


  • Protect any tender plants from freezing with a frost cloth. Protect small plants with leaves or mulch.
  • Start a new compost bin.