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.
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.
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?
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
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
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.
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?
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.
My gardenia plant and grapefruit tree have a black growth covering the leaves. What is it?
Your problem could be attributed to sooty mold, which is often caused by pests. This article will help you learn more:
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:
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.
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:
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.
This article explains the water requirements for citrus trees: https://www.gardeningknowhow.com/edible/fruits/citrus/tip-on-water-requirements-for-citrus-trees.htm