5 Cryptomeria Globosa Nana Problems and What Should You Do!

If you are a Cryptomeria Globosa Nana(Japanese Cedar) plant lover and face issues like leaves yellowing, leaves browning, falling leaves, plants not growing and blight, then you are not alone.  

These problems spoil the beauty of your cryptomeria plants. So it is very much important to know about simple solutions.  

In this article, I will discuss possible solutions to all Cryptomeria Globosa Nana plant problems. So stay with me and read the article thoroughly.

5 Proven Ways to Fix Cryptomeria Globosa Nana Problems

Fix Globosa Nana Cryptomeria Issues

1. Leaves Browning

Browning of Cryptomeria Globosa nana leaves is a very common problem. This problem is more common, especially in winter. But it doesn’t change color suddenly, if you pay close attention you will see the leaves start to take on a burnt color after three to four days.

Cryptomeria Globosa Nana Leaves Browning


  • Improper Watering
  • Poor Soil
  • Excess Wind

Fixing Guide

Although cryptomeria globosa nana plants have very low water needs, they prefer two to three inches of deep watering. However, the demand for water may increase slightly during dry periods.

If you don’t want the green leaves of your plants to look brown, you need to ensure good-quality soil. You can make this soil by mixing 50% clay and 50% perlite. Soil pH should be 6-7. If the pH level is high, you can use a sulphur-containing fertilizer.

You can cover the tree with a thick cloth to protect it from the strong cold wind. This should be done especially at night. It is best to plant the tree at a time when it will not have to endure winter stress. If any part of the tree is damaged by the wind, it should be removed quickly.

2. Yellow Leaves

Among the summer problems, one of the cryptomeria globosa nana plant problems is the yellowing of the leaves. Most of the time the problem is caused by the formation of chlorosis. The problem can sometimes become fatal and leaves fall.

Cryptomeria Globosa Nana  Yellow Leaves


  • Sunburn
  • Lack of Iron and Nitrogen

Fixing Guide

Too much sunlight will turn the leaves of your Cryptomeria plant yellow. So no more than six to seven hours of direct sunlight a day is needed. Cover your plant with a shade cloth for the rest of the day. In times of drought, the amount of water given to the plants should be doubled.

A nitrogen-rich fertilizer is best to compensate for nitrogen deficiency. You can use an NPK (10-10-10). But there is another simple method that I follow.  You can mix 150 ml of urine with a pinch of Epsom salt and use it on the root of the plant.

Spraying liquid iron fertilizer on affected leaves is the best idea to compensate for iron deficiency. But you can also use powdered fertilizer. But care should be taken not to apply excess fertilizer. Fertilizer can be applied twice a year.

3. Falling Leaves

There are some trees that shed their leaves at the end of winter to produce new leaves.  However, cryptomeria globosa nana plants do not shed leaves. So if your tree suddenly starts dropping leaves it is definitely a matter of concern and you need to take immediate action.


  • Stressful Environment
  • Lack of Nutrients 

Fixing Guide

Cryptomeria plants are generally suited to the climate of Japan and China. So if your location is outside this region then you need to take extra care. First of all, temperature and humidity should be taken care of. 

17-25°C temperature is ideal for Cryptomeria globosa nana plants. If the temperature in your location is too low, try to give the plant more sunlight during the day. If your plant is a bonsai and is in a room, you can easily control the temperature with the help of a temperature controller machine.

Normal humidity level i.e, 40-50% humidity is best. Care should be taken to ensure that excess air does not absorb moisture during winter. Bonsai trees cannot be kept in the kitchen or washroom.

Fertilisers rich in magnesium and potassium should be used to prevent leaf drop. My rock powder and wood ash are good sources of potassium. You can use it if you want. Organic compost is very effective in bridging magnesium deficiency.

4. Not Growing

Cryptomeria plants are generally somewhat slow growing. However, if it does not grow three to four feet a year, you should know that your tree has an internal problem. And you have to try to solve them.


  • Over Watering 
  • Fertilizer Burn

Fixing Guide

If your plant is mature, watering once every two to three weeks is sufficient. The drainage system should be improved so that water does not accumulate at the base of the tree. 

Trees should not be planted in places where rainwater accumulates. If your tree is a bonsai, it should have four to five small drainage holes in its trunk.

Avoid applying excess fertilisers. Fertiliser accumulation at the base of the plant, wilting of the plant, stunted growth, and scorched leaves are signs of over-fertilization.  

In that case, the plant should be watered a lot, excess fertilizer should be removed, and if there is an option the soil should be changed.

5. Cryptomeria Globosa Nana Blight

Blight is a well-known problem of Cryptomeria plants. It is a pathogenic disorder. Yellow spots usually appear first from the top to the bottom of the plant and later turn brown. The problem is quite complex.


  • Waterlogging
  • Fungal Attack

Fixing Guide

Waterlogging and fungal attacks on plants complement each other. So water should not be allowed to accumulate at the base of the plant to prevent fungal attack. However, if the infection has already started, different measures should be taken.

Primary treatment can be started by pruning the infected limb. In this case, the pruning materials must be cleaned with disinfectants and the pruned parts must be burned. The next step is to use a good quality antifungal spray to prevent infection.

Fresh water should be sprayed on the plants every morning and evening to prevent re-infection.

Frequently Asked Questions (FAQs)

How do you shape a Cryptomeria globosa Nana?

You can easily do this using a saw or pruning shears. First, you have to think of a shape and identify the parts of the tree that lie outside that shape and prune them. Trim the branches to make room for light. But be careful not to prune too much.

Can cryptomeria globosa nana survive winter?

Even while cryptomeria trees are adapted to cold, snowy areas, they might still use a little extra preventive maintenance throughout the winter. Their branches may get weakened or even shatter as a result of being weighed down by snow and ice.


Before planting a cryptomeria plant you must remember that it is a tough plant. And if your location is not in a suitable zone for plants, extra care is a must.

Problems like leaf drop, yellowing and browning of leaves, and stunted plant growth will trouble you again and again.  But it is wise to find a solution without despairing.

Here I discuss all the cryptomeria plant problems and possible solutions. The more detailed you are about the problem, the easier it will be to fix your tree. Happy Gardening.

James Rivenburg
James Rivenburg
James Rivenburg

James Rivenburg is the founder of plantandpest.com, a passionate gardener with valuable experience and knowledge gained through trial and error. The website has a large community of followers who trust his tips and techniques and have succeeded with his advice. He is always Committed to helping others create a beautiful and healthy garden.

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