Q: We have a very lovely and well-tended hybrid Bermuda lawn. This past fall, and now this summer, it has been invaded by a weed called oxalis. What are your suggestions for killing this weed and not damaging our lawn?
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Q: A combination of overwatering and this heat caused my 9-year-old dwarf pomegranate leaves to yellow and drop on about a third of the plant. I turned off the water and hand watered it with small amounts of water. The only thing I did differently was to give the plants a small dose of Miracle-Gro in the spring. Any suggestions?
Q: You emphasized it’s better to water longer rather than more often. But what if that’s not possible? Our small condo community has an old irrigation system with everything watered from the same lines. We irrigate for nearly 24 hours. Less than that and small plants really struggle. Is there anything we can do?
This is the time of year we see a rise in humidity along with a threat from afternoon rains. This rise in humidity and high nighttime temperatures can also bring plant disease problems. You can do something now to prevent diseases before they occur.
Q: Can you give some tips on how to survive this latest bout of heat? Is it simply too hot right now for plants? Is shade cloth the answer?
Q: Please settle a disagreement between my wife and me. Each spring my wife plants several plants in pots for our patio using bagged potting soil. Each year a few of them die and others live. This happened two years in a row. I contend the potting soils need to have some real dirt mixed in with it to make them better.
Q: I need confirmation of a problem with my grapes. A gardening Facebook group is certain my grape berries have thrip damage this year. I sent you a picture to confirm it or not.
Q: We have a 30-foot-tall lemon tree planted in late 2006. This tree produces large fruit, averaging 15 ounces to more than a pound. I consider this tree to be perpetual as it flowers fruit and maintains a crop in development at the same time. My question is, do we pick the ripe fruit or let them fall as they may?
Q: Once again I had a fairly good crop of tomatoes this year. One problem, though, a lot of ripe tomatoes are disappearing overnight. Are gray rats known for foraging and consuming garden produce? I spotted one about a week ago going over a side wall in my yard.
Q: I am trying to grow an avocado tree. I have it in a container, and it’s now 22 inches tall. When is the best time to transplant, and what is the best way to take care of it in our desert?