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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
Citrus cuttings should not be planted upside down

Cuttings from citrus trees should be cut slanted at the bottom and straight across at the top end. Cutting them slanted at the bottom end helps to not confuse the top from the bottom.

Chelated iron fertilizers need water to work

If you are going to apply an iron fertilizer it should be in a chelated form. The best all-around chelate to use is a chelated iron fertilizer called EDDHA.

Bitter orange can be hard to find in Las Vegas

Q: Is it possible to grow sour or bitter orange in Las Vegas? It’s becoming almost impossible to find at the local markets, and we use it in so many recipes. I was curious if that was something that might grow here. When should I plant it?

Winter freezing temperatures can damage plants

Chilling injury is due to cooler or cold weather (above freezing) temperatures to tropical plants growing outside of — or close to — the fringes of their normal range.

Healing of tree from wind damage can take 2-3 years

After a tree is damaged during a windstorm, healing can take two to three years if the tree is kept in good health. To do that, clean up the wound and apply management practices that encourage it to heal.

Apply annual landscape fertilizer to fix yellowing leaves

Yellowing of bottle brush leaves oftentimes occurs when the soil is low in nutrients and organic matter content. Fix yellowing leaves by applying a landscape fertilizer every year in the spring and combine it with an annual application of chelated iron.

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