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Bob Morris

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.

Slime mold fungus in lawn causes no harm

Slime mold fungi are particularly disgusting because they are gelatinous and, over time, change color if they’re left undisturbed. Slime molds can lay atop the grass and smother it.

Rabbits can kill tree by eating trunk

If rabbits ate the trunk of a tree in a complete circle around the trunk, it’s a goner. Let it sucker from the bottom and start a new tree from the suckers.

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Woodchips should be used as mulch not amendment

Adding woodchips to the soil as an amendment has gained popularity largely because of social media. Woodchips applied to the soil surface as a mulch is OK, but mixing these into the soil can lead to problems if you aren’t careful.

Stay away from heirloom varieties of asparagus

Asparagus usually grows well here, but there are some differences among the varieties. Stay away from heirloom varieties such as Mary Washington because they don’t produce enough spears in any climate.

Spray grapevines to control pests

Grapeleaf skeletonizer and grape flea beetle were found in the orchard during the last couple of days. These two pests damage grape leaves but few other plants.

Removing dead fronds doesn’t affect health of sago

Q: The top ring of sago palmfronds died after I transplanted it but remain on the plant. I left this brown ring of fronds around the crown of the plant and it looks like new growth coming from the center is OK. Should I trim off the dead fronds without disturbing the crown or just let them fall off?

Yellow leaves not necessarily caused by fertilizer

Q: I see many times where you’ve said fruit trees only need feeding in the spring. However, without periodic applications of nitrogen, my 3-year-old peach tree leaves become yellow. Could there something going on I should investigate?

Waxleaf privet should have more than one drip emitter

Q: I purchased a few waxleaf privet plants in February. They were planted in my yard using drip irrigation with one drip emitter per plant for about one month now. I am starting to see some black markings and yellowing on the leaves. I also think there may be some root rot, but I am unsure.

Removing excess fruit allows remaining fruit to grow larger

If you have fruit trees, the next big tree management activity you are facing is fruit thinning or removing excessive amounts of fruit so that the remaining fruit gets larger. Peaches, nectarines, plums, apples and pears must have excessive fruit removed if you want larger fruit. Do this as soon as the fruit reaches the size of your thumbnail.

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