Master Gardeners

In 2003, Warren County held its first Master Gardener program. Since that time, the Master Gardeners have taken on several community projects. One of those projects include maintaining the landscaping and grounds around the Schowengerdt Historical Home in Warrenton. 

photo: Schowengerdt Historical Home

Schowengerdt Historical Home in Warrenton,
a Master Gardener project

Master Gardeners are individuals who enjoy learning and sharing their gardening knowledge with others. There are no prerequisites to participate in Master Gardener training, except to have an interest in gardening, a willingness to learn and a desire to give back to local communities through volunteer service and education.

After completing training, Master Gardeners expand the reach of University of Missouri Extension using research-based horticultural information to answer gardening questions in their local communities.

The Warren County Master Gardeners meet the second Tuesday of the month at the extension center to learn and to share project ideas and opportunities. 

We are proud to announce that the Master Gardener training course is now available online at:

Spring Lawn Care - Aeration, Fertility and Crabgrass Control (PDF)


Train online to be a Missouri Master Gardener

For any questions please contact the Warren County Extension Center 636-456-3444


June Garden To-Do List

-Falling Fruit. Don't be concerned about June drop of tree fruits. It's a natural thinning process. Prop up heavy branches to prevent breaking. Fruit should be spaced six to eight inches apart on a branch.

-Tomato Talk. For staked tomatoes, remove suckers when they are 1-1.5 inches long.

-Halt Harvesting. Stop harvesting asparagus and rhubarb toward the end of the month. This allows the plant plenty of time to store food for next year.

-Blanching Time. Blanch (block light) from cauliflower when heads are two inches in diameter. Tie leaves over the developing heads.

-Thin Phlox. Trim back garden phlox stems to improve air circulation. Thin out all but the five strongest stems per plant. This helps prevent mildew.

-Insect Control. Use floating row covers as an insect barrier. They are effective as a control on crops like spinach, beets, carrots and the cabbage family by preventing adult insects from laying eggs on veggies.

-Pull Greens. Pull cool season crops such as lettuce, radishes, and spinach as they bolt. Prepare the beds for fall plantings. If the bed will not be used for a while plant a cover crop like buckwheat.

-Use Vinegar on Weeds. Research has shown that vinegar provided 80-100% kill of certain annual weeds.

-Included are foxtail, pigweed, and Canada thistle. Use full strength and spray directly on young weeds as they emerge. It's an organic solution to an old problem.

-Liberate Houseplants. Move houseplants outside for the summer. Water as needed and watch for insects.

-Protect Strawberries. Keep birds from strawberries by covering with netting.

-Make Compost Tea. The plants will thank you by showing a growth spurt. Place a couple of shovels of compost into a burlap bag. Tie the bag and place into a 30-gallon trashcan full of water. Cover and let set for a couple of weeks before using.

-Deadhead. Deadhead annuals as blooms fade to ensure a constant show of color and promote long blooming.

-Encourage Pine Trees. June is the proper time to pinch candles (new growth) from pine trees. This promotes fullness