Grapefruit Trees

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  1. Citrus Trees Leaves Curling
  2. Scale Infestation
  3. Grape Fruit Harvesting
  4. Do I Have to Have a Special Type of Soil to Plant Citrus Trees?
  5. Black Growth on Leaves
  6. Fertilizer for Citrus Trees
  7. Water Amounts
Asked by Anonymous on November 8, 2010
Citrus Trees Leaves Curling

What causes leaves, primarily young ones to curl or wrinkle in a spiral motion in lime, orange, tangerine, grapefruit trees. We have irrigation every two weeks.

ANSWERS
Heather
Certified GKH Gardening Expert

You may not be watering it enough. You need to make sure that the water gets all the way through the soil. If the soil is very dry, it may actually start to repel water. So enough water for another plant would not be enough to rehydrate this one. Give the soil a good, deep soaking at least once a week (in addition to regular watering) and that should insure that it gets enough water.

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Asked by Anonymous on January 22, 2011
Scale Infestation

I have some grapefruit trees and they have had scale for about a year and a half now. I’ve started using an insect soap and the scale have mostly disappeared, but there are still some left. I can’t get rid of them, what can I do?

ANSWERS
Nikki
Certified GKH Gardening Expert

Try using neem oil. It is organic and very effective against these pests. Here is more information: https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm

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Asked by Mr. Chuck on February 20, 2011
Grape Fruit Harvesting

Does leaving ripened fruit on the tree delay the next crop start / development?
Tree currently carrying a large number of ripe / yellow fruit, should I clear tree of some?
Tree has estimate age of 12 years.

We reside in Orange county, California 92691

ANSWERS
dswift

You should really harvest the ripe fruit for several reasons, the least of which is increased risk of tree damage during a storm or heavy winds with heavy fruit on the branches. Also, fresh fruit picked will last a long time under the right conditions. It doesn´t spoil so quickly if really fresh. And yes, the fruit will take some of the life out of the tree when it is trying to blossom for the next season. Hope this helps.

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Asked by SMay40 on March 4, 2011
Do I Have to Have a Special Type of Soil to Plant Citrus Trees?

I have three citrus trees that I would like to plant in my yard. 1 is a Rio Rubyred Grapefruit tree, 2nd is a manderin Orange tree, 3rd is a satsomo orange tree. I live in TX down by the coast. Do I need special soil to plant my trees?

ANSWERS
Heather
Certified GKH Gardening Expert

You do not need any special soil to plant them. As a general rule of thumb I tell people to get their soil tested before planting just so you can address any nutrient deficiencies before planting. You may also want to amend the soil with compost as plants in general like organic rich soil.

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Asked by Anonymous on March 7, 2011
Black Growth on Leaves

My gardenia plant and grapefruit tree have a black growth covering the leaves. What is it?

ANSWERS
Nikki
Certified GKH Gardening Expert

Your problem could be attributed to sooty mold, which is often caused by pests. This article will help you learn more:
https://www.gardeningknowhow.com/plant-problems/disease/how-to-get-rid-of-sooty-mold.htm

You can treat this with neem oil. It gets rid of both the fungus and the pests that cause the fungus. Here is more info on neem oil:
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm

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Asked by Anonymous on March 23, 2011
Fertilizer for Citrus Trees

I would like the numbers that correspond to the correct ratio of nitrogen to phosphorus in grapefruit fertilizer. I used a 10-10-10 citrus tree fertilizer and there is a huge amount of rind compared to flesh.

ANSWERS
Nikki
Certified GKH Gardening Expert

A fertilizer with 16-5-16 or 16-5-20 should be effective for fertilizing citrus trees in your area.

This article will also help:
https://www.gardeningknowhow.com/edible/fruits/citrus/citrus-fruit-thick-rind.htm

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Asked by Anonymous on March 30, 2011
Water Amounts

We are wondering how often and how much water to set for a timed release during the summer months for our grapefruit, lemon, and pomegranate trees.

ANSWERS
Nikki
Certified GKH Gardening Expert
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