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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

Office Hours:

Monday - Friday,
8:30 a.m. - 5 p.m.

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

Map to our office

K-State Research and Extension is committed to making its services, activities and programs accessible to all participants. Reasonable accommodations for persons with disabilities may be requested by contacting Johnson County Extension at (913)715-7000. Notify staff of accommodation needs as early as possible.

Kansas State University Agricultural Experiment Station and Cooperative Extension Service

K-State Research and Extension is an equal opportunity provider and employer.

December Garden Calendar

Vegetables and Fruits

  • Store leftover seeds and a cool, dry location, for example, in a sealed jar placed in the refrigerator.
  • Check vegetables in storage for spoilage.
  • Mulch strawberries for winter protection.
  • Clean and oil garden hand tools for winter.


  • Mulch roses by mounding soil 6 to 8 inches deep over the plants to protect the graft.
  • Mulch perennial beds with 2 to 4 inches of straw, shredded leaves, or other lightweight material.
  • Cut tall hybrid tea roses back to 18 to 24 inches to reduce wind whipping and plant damage.
  • Continue to plant spring flowering bulbs until the ground is frozen. Water and mulch.
  • Give plants or gift certificates as holiday gifts for gardening friends.
  • Empty decorative pots and containers. Store inside or decorate for winter.


  • Pick up fallen leaves, limbs, and other debris from lawn to prevent suffocation of the turf during winter.
  • Store any left over lawn fertilizers in dry location and out of reach of children and pets.
  • Store pesticides in a cool (not freezing) dry location for winter, out of reach of children and pets.

Trees and Shrubs

  • Keep heavy snowfall from limbs of trees and shrubs by lightly shaking to avoid damage.
  • To prevent breakage, avoid shoveling snow onto trees and shrubs.
  • Check and protect the trunks of young trees and branches of shrubs for rabbit damage.
  • Living Christmas trees are special. Leave in your home no longer than one week, then acclimate to outdoors and plant in a desirable location.
  • Prune damaged branches throughout the winter months.
  • Water newly planted trees and shrubs in winter to prevent dry soil conditions.
  • Mulch roots of tender shrubs such as azaleas and rhododendrons to keep vigorous during winter.
  • Prune branches of junipers, pines, hollies, and other plants to use as holiday decorations.


  • Start planning for next year by making notes and preparing orders.
  • Turn compost pile to encourage winter breakdown.

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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