Garden Calendar

We have developed a Garden Calendar, After Care Guide for New Plantings, and links to your local garden weather. There are differing guidelines for each climate and topography: from the mountains of Colorado to the coastal West.

JanuaryJanuary:

  • Winter water if temperatures are above freezing
  • Deep root water trees.
  • Prune dead wood from trees and shrubs except maple, birch, and walnut trees.
  • Prune summer flowering shrubs only.
  • Remove heavy snow from trees and shrubs.
  • Plan next season’s flower gardens.
  • Repair and sharpen tools.

February:

  • Winter water if temperatures are above freezing
  • Deep root water trees.
  • Prune dead wood from trees and shrubs.
  • Prune summer flowering shrubs only.
  • Remove heavy snow from trees and shrubs.
  • Plan next season’s gardens.
  • Repair and sharpen tools.
  • Spray for spruce gall aphids.

March:

  • Winter water if temperatures are above freezing.
  • Deep root water trees.
  • Prune dead wood from trees and shrubs.
  • Remove heavy snow from trees and shrubs.
  • Cut back perennials and grasses before new growth appears.
  • Apply pre-emergent herbicide to flower/shrub beds.
  • Spring Equinox.

April:

  • Activate, check, and adjust irrigation system.
  • Core, aerate and fertilize lawn.
  • Begin lawn mowing if needed.
  • Compost lawn clippings and garden greens.
  • Remove winter tree wrap.
  • Cut back Blue Mist Spirea and prune roses back to live wood.
  • Remove mulch from crown of hybrid tea roses.
  • Divide and relocate perennials.
  • Top dress flower/shrub beds with compost.
  • Renew bark mulch in flower/shrub beds.
  • Apply pre-emergent herbicide to flower/shrub beds.
  • Apply crabgrass preventative.
  • Fertilize trees, shrubs, perennials and groundcovers.
  • Clean pond, check and clean pond skimmer.

May:

  • Divide and relocate perennials.
  • Compost lawn clippings and garden greens.
  • Top dress flower/shrub beds with compost.
  • Fertilize trees, shrubs, perennials, and roses.
  • Renew bark mulch in flower/shrub beds.
  • Plant summer bulbs.
  • Plant annuals and vegetables after the last average frost.
  • Pinch back the new candle growth on Mugo pines to maintain compact growth.
  • Fertilize trees, shrubs, perennials and groundcovers.
  • Remove spent blooms from spring bulbs.
  • Weed while plants are small and before seed heads form.
  • Apply pre-emergent herbicide to flower/shrub beds.
  • Continue to check and clean pond skimmer every other week.

June:

  • Prune spring flowering shrubs once flowers have faded.
  • Deadhead perennials to maintain continued blooming.
  • Compost garden organic refuse.
  • Fertilize lawn again before hot weather.
  • Weed while plants are small and before seed heads form.
  • Check trees and shrubs for insect pests, especially mountain pine beetles.
  • Continue to check and clean pond skimmer every other week.
  • Continue to monitor irrigation system and adjust clock.
  • Summer Solstice

July:

  • Prune flowering shrubs once flowers have faded.
  • Deadhead perennials to maintain continued blooming.
  • Compost garden organic refuse.
  • Check trees and shrubs for insect pests.
  • Apply chemical weed control while plants are young.
  • Continue to check and clean pond skimmer every other week.
  • Continue to monitor irrigation system and adjust clock.

August:

  • Prune flowering shrubs once flowers have faded.
  • Deadhead perennials to maintain continued blooming.
  • Compost garden organic refuse.
  • Check trees and shrubs for insect pests.
  • Apply chemical weed control while plants are young.
  • Continue to check and clean pond skimmer every other week.
  • Continue to monitor irrigation system and adjust clock.

September:

  • Check trees and shrubs for insect pests.
  • Deadhead perennials to maintain continued blooming.
  • Compost garden organic refuse.
  • Fertilize lawn again before winter.
  • Continue to check and clean pond skimmer every other week.
  • Continue to monitor irrigation system and adjust clock.
  • Autumnal Equinox

October:

  • Plant spring flowering bulbs.
  • Divide and relocate perennials.
  • Clean up leaves, remove dead annuals, and debris.
  • Compost garden organic refuse.
  • Use tree wrap on young trees to reduce sunscald.
  • Winterize pond and other water features.
  • Shut down, drain and winterize irrigation system. Blow out system if necessary.

November:

  • Mow lawn one last time.
  • Prune summer flowering shrubs only.
  • Cut back dead perennials, but leave decorative seed
  • heads for winter.
  • Clean up leaves, remove dead annuals, and debris.
  • Compost garden organic refuse.
  • Mulch the crowns of hybrid tea roses.
  • Remove heavy snow from trees and shrubs.

December:

  • Winter water if temperatures are above freezing
  • Deep root water trees.
  • Prune dead wood from trees and shrubs.
  • Remove heavy snow from trees and shrubs.
  • Winter Solstice