Bob Morris is a horticulture expert living in Las Vegas and professor emeritus for the University of Nevada. Visit his blog at xtremehorticulture.blogspot.com. Send questions to Extremehort@aol.com.
For those who would like quality roses, Plant World Nursery on West Charleston Boulevard has brought in Weeks roses. These are high quality roses. They will cost more than roses produced for mass merchandisers but they are high quality. For a recommended rose for the desert, visit my blog and search for “best roses for the desert.”
Question: Do oranges grow in Las Vegas? Also, when is the best time to plant a new tree?
Q. Are these nematodes on my tomato roots in the picture I sent to you?
Question: During the excessive hot spell in July, our irrigation failed while we were out of town. As a result, one of our queen palms lost all of its branches. In spite of subsequent life support, it does not appear to be coming back. Is that too much to hope for? Is there anything we can do to help it recover, or should we just mourn its passing?
Reports from the weather station at the University of Nevada Cooperative Extension orchard in North Las Vegas put the low temperatures Dec. 6 and 10 at 20 F with daytime highs around the same as the inside of a refrigerator. I am sure this caused some damage to plants. I posted the weather report on my blog for those interested.
Question: Have you ever heard of adding vinegar or citric acid when fertilizing plants in our area?
Q. I am interested in raising dragon fruit. Any suggestions or comments?
Question: I have seven fruit trees, including some citrus, that I planted in half whiskey barrels about three years ago. They all have had fruit the past two years. I want to transplant them into the ground in order to get more fruit. Is it best to transplant them in the fall or early spring?
Q: I have a pomegranate plant that I started two years ago. It is about four feet tall now, and looks like it wants to be a bush.
Don’t forget that one of the places you can visit to see a holiday lights display is Ethel M Chocolates Botanical Garden at 2 Cactus Garden Drive in Henderson near the intersection of East Sunset and Mountain Vista.
Question: I planted about 12 gardenias a couple of months ago, and they appear to be dying. I checked the soil, and it’s evenly damp. They have two, 2 gallon-per-hour emitters, and they were all being watered three times a week for 20 minutes.
Question: When is it best to prune crape myrtle? I’ve heard before winter and again just before spring. The last two years, I trimmed back the branches (it is only about 5 feet tall) about one-third of the way in late February. What is right? We live in Aliante.
Q. How do I determine the best time to pick lemons? Mine are yellow with some being very firm and others feeling “givey.” This has been a good year and my Meyer lemon “bush” will afford us lemon curd and juice for the next year.
Question: This question is regarding our bottle tree. Should we trim and shape the tree? It has grown to a considerable height. The wind, appearance, and health of the tree are our concerns. Does the cracking on the trunk need addressing? And should I wrap the trunk in winter?
Q . Before the first freeze in Las Vegas what should I feed my bougainvillea? I have three plants, all in the ground. They are 6 years old and I wrap their bases before the freeze. They always come back come March and bloom beautifully August through October.
