Rhododendron Plants

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  1. Rhododendrons, Irises Not Blooming
  2. Rhododendron Not Blooming
  3. Rhododendrons
  4. Why are the leaves on my rhododendrons turning yellow
  5. How Do You Get Rid of Root Weevils in the Rhododendrons?
  6. Rhododendron Trees
  7. Rhododendron Pruning
Asked by Anonymous on November 6, 2010
Rhododendrons, Irises Not Blooming

Strangely, both our irises and rhododendrons did not flower this year. Any suggestions?

ANSWERS
Heather
Certified GKH Gardening Expert

Since these are two very different plants that did not bloom, I suspect that you have an issue with phosphorus in your soil. Plants need phosphorus to bloom. Here is more information on that:
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/phosphorus-plant-growth.htm

Have your soil tested to determine what is causing the phosphorus deficiency. You can also add bone meal (https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/bone-meal-fertilizer.htm) to the soil to add phosphorus.

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Asked by Anonymous on November 16, 2010
Rhododendron Not Blooming

Our rhododendron didn’t bloom last spring. It was planted a year ago. Could it be that our soil is not acidic enough or that the plant is too young?

ANSWERS
Heather
Certified GKH Gardening Expert

There are many reasons a plant may not bloom. The most common is that the plant is not getting enough sunlight. While rhododendron like shade, if they are too far back in the shade, they may not have enough light to bloom.

 

Another reason can be a lack of nutrients in the soil. Particularly phosphorous. Try adding a little bone meal to the plant and also have your soil tested at the local extension service to see if it is lacking any other nutrients.

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Asked by Anonymous on April 15, 2011
Rhododendrons

Are rhododendrons poisonous to pets and children?

ANSWERS
Nikki
Certified GKH Gardening Expert

Although it has a low toxicity, it is best to treat all Rhododendrons as poisonous and keep out of reach of children and pets. Rhododendrons are toxic to many domestic animals, including dogs. Do not to allow your dog to remain unsupervised around these plants. They have potentially toxic leaves and flowers and even the honey from their flowers can be poisonous. While human fatalities from eating these plants are rare, victims who consume a lot suffer from nausea, vomiting, abdominal upset, and low blood pressure.

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Asked by cedron on April 16, 2011
Why Are the Leaves on My Rhododendrons Turning Yellow

Why are the leaves on my rhododendrons turning yellow?

ANSWERS
Heather
Certified GKH Gardening Expert

There are several things that can cause this. This article will help you pinpoint which cause could be affecting your plant:
https://www.gardeningknowhow.com/plant-problems/environmental/plant-leaves-turn-yellow.htm

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Asked by CANTRELL on April 21, 2011
How Do You Get Rid of Root Weevils in the Rhododendrons?

How do you get rid of root weevils in the rhododendrons?

ANSWERS
Heather
Certified GKH Gardening Expert
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Asked by Anonymous on May 8, 2011
Rhododendron Trees

Is it possible to start a new tree from a branch or other places from an existing tree?

ANSWERS
Nikki
Certified GKH Gardening Expert
Asked by Anonymous on May 10, 2011
Rhododendron Pruning

Huge rose-colored blooms now. Plant is about 8 feet tall and must be 15 or 20 years old. What is the best method for pruning this back down to 5 or 6 feet? All at once or over 3 years?

ANSWERS
Nikki
Certified GKH Gardening Expert
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