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Johnson County

Research-based Information You Can Trust — Localized for your needs

Johnson County
11811 S. Sunset Drive
Suite 1500
Olathe, KS 66061

(913) 715-7000
(913) 715-7005 fax

Map to our office

June Garden Calendar

Vegetables and Fruits

  • Renovate June bearing strawberry beds
  • Fertilize strawberries and water regularly to promote new growth
  • Plant another crop of sweet corn and green beans
  • Watch tomatoes for foliar leaf disease development and treat
  • Mulch crops for moisture conservation and weed control
  • Continue a regular fruit disease and insect control program
  • Treat peach trees for trunk borers
  • Remove sucker growth from base of trees and along branches
  • Pinch herbs to keep bushy and fresh with new growth
  • Turn compost pile and keep moist for a quicker breakdown


  • Pinch chrysanthemums for development of a bushy plant
  • Deadhead spent flower blossoms to keep plant flowering
  • Remove flower stalks from peonies and iris
  • Mulch flower gardens for the summer to conserve moisture, control weeds and cool the soil
  • Water plants as needed
  • Fertilize roses with about 1 cup of low analysis fertilizer per plant
  • Trim spent rose blossoms
  • Check plants for insects
  • Remove dead foliage from spring bulbs
  • Water and fertilize container plantings regularly to encourage growth and flowering


  • Raise mowing height on bluegrass and tall fescue to 3" or 3 ½" for summer heat resistance
  • Fertilize zoysia lawns with high nitrogen fertilizer such as 27-3-3
  • Sod or plug bare areas in zoysia lawns
  • Spot treat for broadleaf weeds
  • Core aerate zoysia lawns for removal of thatch and overall vigor
  • Let grass clippings fall for nutrient recycling
  • Water the turf sparingly to increase drought tolerance during heat of summer. Let turf wilt between watering for best results
  • Check mower blade for sharpness and sharpen as needed
  • Check lawn mower engine oil and add or change according to owners' manual

Trees and Shrubs

  • Check for bagworms and control as needed
  • Mulch around the bases of trees and shrubs to conserve moisture
  • Prune pines and spruces to shape and control size
  • Water newly planted trees and shrubs as needed
  • Prune spring flowering shrubs
  • Do not damage tree trunks with mowers and weed whips
  • Check for spider mite damage on various shrubs
  • Clip hedges as needed to maintain shape


  • Fertilize throughout the summer months to encourage growth
  • Wash leaves to remove dust
  • Take cuttings to start new plants
  • Prune and shape plants for added beauty
  • Repot plants as needed in 1" larger containers
  • Check for insect problems

Return to Garden Calendar

K-State Research and Extension Johnson County Master Gardener logo

Have questions? The Garden Hotline is staffed by trained EMG volunteers and Extension staff who will assist you with questions.

Phone: (913) 715-7050

Email: garden.help@jocogov.org