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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
Fruit trees that flower early produce fruit early

Generally, the varieties of fruit trees that flower earliest produce the earliest fruit. If there is a frost while the flowers are open, it will produce less fruit or maybe no fruit at all.

Time running out to apply iron fertilizers to soil

We are nearing the end of any soil applications of iron fertilizers that work. Once early spring through early summer has passed, the only thing that cures leaf yellowing is the leaf sprays applied directly to yellowing leaves.

No sunlight causes Canary Island palm fronds to die

Canary Island palm trees have a big head that produces heavy shade so it’s possible that the lower fronds may die due to a lack of light. If the lower fronds are dying, the palm tree needs to be pruned.

Las Vegas soils benefit from adding sand

If you want to improve drainage for cactuses then plant them higher than the surrounding soil. This type of cactus requires deep but infrequent irrigation.

Watering terms can be confusing in Southern Nevada

As we water plants infrequently, the roots extract water and grow into deeper layers of soil. Deep rooting of plants is the main reason good gardeners say, “Water plants deeply but infrequently.”

Buying privacy plants? Always consider height

Privacy shrubs should be tall enough to create the privacy needed but not much taller. Bigger shrubs need more water than smaller shrubs, and they need more maintenance as they get older.

Lack of water can cause leaf drop in trees

California pepper tree is evergreen. Evergreen plants constantly drop leaves all season long but drop their leaves heaviest soon after times of new growth.

To stop fruit production, spray tree when flowers open

To prevent fruit production in an ornamental tree, spray the it with a chemical every year to get the fruit to drop when it’s still small. Spray the entire canopy of the tree when as many of the flowers are open as possible.

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