If young trees are given a lot of nitrogen fertilizer then new growth will be pushed at the expense of flowering.
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 [email protected]
Desert climates are notoriously low in humidity, particularly as the day gets warmer, so we enjoy fewer plant diseases and worry about them less than in places with humidity.
Without flowering it’s impossible for a fruit tree to produce fruit. If the tree flowered in previous years but not this year, then it is either something you did that contributed to its lack of flowering or something inherent to those varieties of fruit trees.
Plants like mesquite, palo verde and acacia are xeric in their water use. They use less water than alternative trees and shrubs and are controlled with applications of water.
Once a landscape design is finished, the amount of water it needs is fixed. You won’t be able to change the amount it needs, by much, without removing plants or changing them.
Weed control is the No. 1 pest problem for farmers. Pests include insects, diseases and weeds, not just insects.
The three worst weeds to control in home landscapes are common Bermuda grass, nutgrass and palm seedlings. Controlling common Bermuda grass and nutgrass organically requires persistence — knocking them back as soon as they appear until they finally start surrendering around late summer.
Dormant oil sprays are applied on warm, windless days during the winter to trees and shrubs after they are pruned. That’s when insects susceptible to these sprays are most vulnerable.
Lumps or bumps on the trunk are probably epicormic nodules, places on the trunk covered by thin bark that have a cluster of buds under it. These buds will sometimes grow into shoots. On some trees removing these shoots as soon as they are seen may cause these nodules to stop producing shoots or fewer of them.
I like deals. Buying a large tree in a box and getting it planted for free is a good deal. Just have it done right.