If the Thuja Smaragd gets brown spots, the shoots change color or the tree of life gets brown tips, this is an alarm signal for the gardener. Illnesses are rarely responsible. Brown discoloration of the Thuja Smaragd is often caused by incorrect care or pest infestation.
What causes brown discoloration in Thuja Smaragd?
Brown discoloration on Thuja Smaragd can be caused by drying out, too much water, sunburn, frost damage, diseases, fungal infestation, pests, road s alt or over-fertilization. If you have brown tips, you should cut them off; if there is large discoloration, a strong pruning can help.
Brown discoloration on the Thuja Smaragd
There are a number of reasons that can lead to brown discoloration on a Thuja Smaragd:
- Tree of life dries up
- too much water
- Sunburn
- Frost Damage
- Diseases
- Fungal infestation
- Pests
- Sprinkling s alt
- Overfertilization
If it's just brown tips, you can simply cut them off. If the tree of life suffers from brown discoloration over a large area, severe pruning can help. Sometimes the Thuja Smaragd can no longer be saved.
Diseases of Thuja Smaragd
Thuja Smaragd in a good location and with proper care rarely suffers from diseases. However, disease infestation cannot be completely avoided if it is caused by fungi or pests.
If the tree of life is otherwise well, the hedge can usually cope with an illness on its own. You can strengthen them with special preparations from garden shops.
Brown shoots due to fungal attack
Fungal infestation is particularly easy in hedges because of the dense growth. If you are sure that it is a fungus, you can use a broad-spectrum fungicide (€62.00 on Amazon).
Pests turn the tree of life brown
The primary pest is the leaf miner. It causes brown tips and ensures that the discoloration spreads to the entire shoot.
You can recognize a pest infestation by the feeding passages in the shoots. There are also small black piles of feces on the needles.
Cut off infected shoots and discard them. If the infestation is severe, using a spray from a gardening store can help.
Brown discoloration on Thuja Smaragd due to external circumstances
Occasionally the brown discoloration occurs because you cut the Thuja Smaragd at a bad time.
You should only cut Thuja Smaragd when the sun is not shining too strongly and the branches are not too wet.
Sprinkling s alt also leads to brown shoots. Therefore, always plant a thuja hedge at a sufficient distance from roads and paths that are kept ice-free with road s alt in winter.
Thuja Smaragd needs a lot of planting distance
Brown discoloration is particularly common with Thuja Smaragd. If the affected arborvitae is in a hedge, it may be because the planting distance is too close. The roots then don't have enough space, it's too dry or there aren't enough nutrients available.
Tip
Root rot occurs when the tree of life is in a location that is too moist. Thuja Smaragd does not tolerate waterlogging at all. Ensure the soil has good drainage.
