HOrT COCO-UC Master Gardener Program of Contra Costa

Since we’re approaching fall and the best time to plant many landscape trees, it’s time to talk about staking those trees. Many newly planted trees do not need to be staked. Trees that might benefit include those planted in windy areas or on slopes, trees planted in sandy soil, and top-heavy trees with no…

Note: this is a rerun of an article originally printed in the Contra Costa Times. Q: I have a crape myrtle and every year it is covered in a whitish powder. I have been told it is powdery mildew, but I don't know how to control it.A: Powdery mildew is a plant disease caused by a fungus, Erysiphe…

A favorite summer flower is dahlias – little ones, big ones and even really big ones as is Dahlia imperialis growing from 8 to 12 feet tall.Were your dahlias looking fantastic earlier this summer, full of stunning blooms and healthy leaves but now they are starting to look a little tired? Here is a short…

Understanding the ins and outs of fertilizing your garden can sometimes feel overwhelming. The shelves of colorful products at the local shop, sometimes with confusing labels, promise magical results. By keeping in mind some basic facts about fertilizers and fertilizing, you may approach the task with much…

Note: This article was previously published in 2018. We are rerunning it because we are noticing this happening in many gardens right now.Client's Request: Why no tomatoes? Starting to get lots of flowers but almost NO tomatoes? Plants look very healthy. I live in central Contra Costa County.MGCC Help Desk…