Azaleas, Camellias, And Rhododendrons- Abiotic Disorders

There are several abiotic disorders that can create symptoms on camellias, azaleas, and rhododendrons.

Iron Chlorosis

Analysis- Iron chlorosis is a problem because these three plants are acid-loving plants. This is caused by a deficiency of iron in plant tissue. Even if your soil has iron in it the iron is not available to the plant because it is in an insoluble form.  If your plant is close to concrete paths or walls and it is in a naturally alkaline areas, you will likely to have iron chlorosis.

Symptoms- The leaves are sometimes  pale green to yellow. The new leaves can be completely yellow, with the tissue and veins remaining green.

Treatment- To treat your plants you will need to increase soil acidity by adding iron sulfate, sulfur, or ammonium sulfate. After you do this check the soil pH  and if you need to add more chemicals, do it now. Another way to do this is by mulching soil with leaf mold or pine needles and them use a fertilizer that is formulated for acid-loving plants. If this does not help then you will need to spray the foliage with cheated iron.

Salt Burn

Symptoms- The leaf edges of these plants will turn brown and brittle. The lowest leaves on a plant which is the older leaves, the browning will occur.

Analysis- This happens when excess salts which are in the soil that are taken up by the plant and it all  goes to the leaves. Salt burn is usually found in areas that are long-term or short-term low rainfall and when to much fertilizer has been used. This problem can just in acid or alkaline soil. If you have these plants planted in containers or in poorly drained soil, there is a chance that you will have this  problem with your plants.

Windburn, Sunburn, And Winter Injury

Symptoms- The symptoms are that the young, exposed leaves will turn dry and brown, particularly around  their leaf edges, and near tips. One part of your plant may look healthy, while the  other part of the plant looks real sick.

Analysis- If you plant your plant in a cold climate, or in a windy or sunny location you will have this problem. Excess heat and sun can also cause this problem. Plants that are growing in windswept locations., will get windburn and winter injury. When the winter temperatures goes below 32 degree F and if you have strong winds this will cause the leaves to lose moisture a whole lot faster than the roots can replace and they causes these problems. Leaf burn will occurs on very windy, dry, summer days or excessive sun in hot temperatures.

Treatment- Plant shrubs in locations protected from  sun or wind will help this situation. Shrubs need to be well-watered during the hot, windy, time. Always water in late fall and winter time to make sure that they are having enough water.

Summary

Camellias, rhododendrons, and azaleas have several physiological or abotic disorders. Probably if
you go by all of these  treatments, this should help all of your problems.

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How To Tell Azaleas From Rhododendrons?

These two ornamental shrubs you can find in yards all over the world. Azaleas has a signature characteristic and it is the vibrant displays of color. The signature characteristic of the rhododendrons is their spectacular and dramatic flower clusters.




These two plants grow in a variety of shapes and sizes. They also have handsome foliage with diverse,  texture, and they have good versatility in landscapes, does not matter whether they are in beds, borders, and containers. Rhododendrons and azaleas are similar in many ways. The two have similar cultural requirements and their landscapes uses are the same. The two  plants have differences in their adaptability, history, and physical characteristics of development, size, leaf texture, and flower type.
The similarities which includes that they all like humus-rich moist, slightly acid, well-drained soil, and they require some shade for best performance. If you want your plants to performed good, plant them by established trees that provide afternoon shade.

They also look alike from afar with their glossy, dark green leaves and shrubby habit. They look very good together.

Native species of azaleas, and rhododendrons are found in a triangle of Asia, including Nepal, parts of southwestern China, and northern Burma.

There are differences between rhododendrons and azaleas. The leaves of the rhododendrons are leathery, and the flowers are in large clusters at the ends of the stems. Azaleas have small leaves and profuse flowers scattered over the entire shrub. Both of the plants have small leaves. The difference between the two plants are the undersides of their leaves. Lepidote rhododendrons are covered in tiny scales, whereas, the azaleas have no scales.

The leaves of rhododendrons are thicker, darker  green and more robust appearing.

The flowers of azaleas are smaller than the rhododendron's. They both have very pretty flowers.

Differences between rhododendrons from azaleas.

AZALEAS
Azalea s leaves are small,, narrow, and painted. The undersides of  leaves have  small hairs and the leaves are  easier, thinner, and softer than those of rhododendrons. Flowers are flatter than rhododendrons. Flowers are on the sides and on the sides and on the tips of the stems. Flowers has five lobes and five stamens.



RHODODENDRONS
The leaves are broad, long, large, and leathery leaves. They have smaller leaves than azalea leaves. The leaves are heavier in texture, and usually hairless. Flowers are more bell-shaped and they are larger than azalea flowers. Flowers have large clusters of each blossoms at the ends of the branches. Flowers have five to seven lobes and ten or more stamens.

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