43°F
weather icon Mostly Clear

Bob Morris

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.

Ash trees not good choice for Southern Nevada climate

Q: I am having trouble finding a tree to replace ash trees. I want something that doesn’t grow so tall and does well in our climate. We took out our ash trees because they were giant and the roots were all at the surface. I am now guessing we have a soil issue. True?

Ash trees do not fare well in desert Southwest

Q: I have two 20-year-old ash trees that appear to be dying. I have attached pictures. The smaller tree is a Modesto ash and it started losing limbs about a year ago. The bark is now separating and it looks like an old stump with a few sprouts. The other is a Rayburn ash. Its limbs started dying this summer, but the limb deaths are accelerating.

Cedar, redwood mulches work better than pine

Question: Would you please tell me what type of mulch is not recommended to put in flower beds? I thought I remembered it being redwood mulch, but I can’t find anything on that. Could it have been cedar? My landscape guy says the shredded cedar is not a problem for vegetation.

If bees don’t get to flowers, plums can’t form properly

Question: I have two Santa Rosa plum trees planted in my backyard. One is planted in a lawn, and the other is in a rock landscape. Both are doing well with numerous large plums growing on them. The one in the lawn area has about 25 percent small yellow plums that fall off when I flick them or shake the branches. The remainder of the larger plums look great.

THE LATEST
Ocotillo thought to absorb water through its stems

Question: I have a recently planted ocotillo. It is tied together by wire. When should I cut the ties? Also, I heard that I should spray the plant with water frequently. What’s frequently?

Red yuccas require dividing and replating to keep small

Question: I’m replacing my red yuccas that have grown too large for a 3-foot area. They are in full sun. They spill over into the walkway where my grandchildren have been getting stabbed by the leaves. Can tree roses handle that location?

If the patio can hold it, container plants can thrive

Question: I live in a third-floor condo that faces south. I get about seven hours of direct sun and have containers on my patio with spinach, tomatoes and peppers that are doing well so far. I was wondering if there are any types of fruit trees that produce and thrive in a patio container.

Options limited for verticillium-resistant trees in desert

Question: We have a 20-year-old olive tree in our front yard diagnosed with verticillium wilt disease. The north third of the tree appears to be healthy. If we remove this tree, what distance from the old hole is needed for the new tree? We would like a replacement tree to provide shade. We are looking at oak, pine, ash, spruce or fir.

Grapes can be gently pruned through summer

Question: After the grapes set their fruit in the next couple of weeks, can the vine be trimmed, or does it need to grow to provide shade and nutrition to the grapes?

Fertilizer should be applied before spring growth

Q: Last week we planted several fruit trees and have established trees as well. Would you recommend applying fertilizer around these trees now? Spikes or granular type of fertilizer?

Bay laurel a bad choice of trees

Question: On the north side of our house, we have a 10-foot-wide space we are trying to landscape. Several have suggested planting bay laurel trees, but we are concerned about the tree’s size for the space. When we went to the nursery, their suggestion was the Majestic Beauty hawthorn tree. Will the hawthorn tree do well in our climate and soils?

Chemical use for stopping olives varies

Question: When is the best time to spray olive trees to minimize olive fruit? One of our olives can make a mess on our neighbor’s front sidewalk and entry patio if not sprayed.

Get pot-bound citrus in the ground

Question: I purchased a lovely Meyer Lemon tree in a 1-gallon pot in the middle of the spring. It already had six lemons on it. I have the original fruit, have new fruit growing and still am getting blossoms. Should I transplant it now into a larger pot or wait until after the fruit ripens and is used?

1 27 28 29 30 31 44
MOST READ
In case you missed it