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Bob Morris

Gardening columnist

Bob Morris is a horticulture expert and professor emeritus of the University of Nevada, Las Vegas. Visit his blog at xtremehorticulture.blogspot.com.

The Latest
Faulty irrigation system can produce brown spots in lawn

Q: We installed a lawn 18 months ago, but it has a difficult time during summer months. I aerate it and fertilize it, and I know the drainage is good because the landscaper installed the system to our HOA requirements. I water twice daily, six days a week around 5 a.m. and 9 p.m. There is a decent amount of shade, and the yard faces south. Even the heavily shaded areas have problems. What can I do differently?

Moisture meters don’t indicate how much water is needed

For those of you following my desert landscape design class, I have scheduled a second eight-week, class beginning Saturday, July 7, in the afternoons. There are only a few seats remaining before it will be full. The next landscaping design class will be offered in late October.

Eight-week class to offer landscaping tips

Q: I want to do something with my yard. I am sick of it being so ugly, but I’m not sure where to start. I had some landscapers who quoted me some prices for doing everything, but they are very expensive. How do I get started?

Calcium is abundant in desert soils but slow to release

Q: Are eggshells good for your garden and should they be added to your compost? Conventional garden wisdom says yes, but I believe that we have too much calcium already in the soils here in Southern Nevada, so adding eggshells is not a good idea. What do you think?

Weed killer may cause yellow leaves on pomegranate

Q: Eleven of my 50 young pomegranate trees have leaves yellowing and dropping off. I water this area once a week by flooding. I sprayed a weed killer, 2, 4-D, near the pomegranates, but I protected each one with plastic to avoid damaging the trees. Where did I go wrong here? If the weed killer is the problem, is there any way to save them?

Cut cactus arms can be replanted

Q: Look what my husband did? He cut my saguaro below the seams before consulting with me. I know it looked kind of sick (the tree, not my husband), but he cut it. I am going to cut those chunks all the way down.

Wood chip mulch can be used between strawberry plants

Q: You have converted me to the doctrine of using wood chip mulch. Is there any reason why I couldn’t use wood chips in my strawberry bed? My wife used to put strawberries in pots, and they never did well.

Grafting different plant on rootstock can produce multicolored flowers

Q: I planted three yellow Lady Banks roses on my south wall when I moved here 10 years ago. Two years ago, my neighbor planted a white Lady Banks rose nearby. This year I noticed white roses growing on my yellow Lady Banks rose. I thought these flowers might be from their plant, but I traced it back to the base of my vine. Will my yellow roses eventually all be transformed to white? How do you explain this botanically?

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