Many gardeners after the winter observe a depressing picture: the needles of fir trees on the site turned yellow. A similar ailment is found quite often and misleads conifer lovers. The reasons why spruce turns yellow in spring or autumn are quite diverse.
Spruce belongs to the genus of evergreen conifers of the pine family. These plants are unpretentious and longevity. The tree does not like drought and has excellent frost resistance. Owners of cottages and private houses love to plant spruce. Also, the conifer is widely used in landscape design. It is generally accepted that spruce is practically not susceptible to disease.
However, trees can suddenly begin to crumble, and their needles lose a beautiful green or blue hue. Small and medium varieties are especially prone to such trouble.
It is important to know that such an ailment is able to hit the forest "beauty" transplanted from the forest and acquired in the nursery. So, the reasons for the yellowing and drying of the needles are the following.
- Lack of moisture. Seedlings that are in temporary containers are often overdried. Thus, after transplanting into the ground, the tree does not take root in connection with the death of small roots. The needles of the conifer begin to turn yellow and fall over time.
- Late boarding. A tree planted in late autumn does not have time to take root in the ground, while the needles continue to evaporate moisture. As a result, the spruce tree experiences dehydration, which leads to sad consequences: young shoots die, the color of the needles becomes brown, and the needles begin to crumble en masse.
- Burns. A young plant exposed in winter is exposed to the negative effects of direct sunlight. They are reflected from the snow-white “bedspread” and practically burn the tender needles of a young tree.
- Pests. The most dangerous of them are Sith spruce aphids. Many varieties of conifers suffer from it. If the owner of the cottage notices that not only the trunk of the spruce, but also the needles becomes yellow, then this indicates an attack by pests. No less fatal for forest "beauties" is the urine of four-legged pets. Dogs and cats often mark territory, which leads to fatal consequences for the plant.
- Low temperatures. In a harsh winter, a young tree can freeze, and in the spring “make happy” the owner of the site with an unusual color of needles. In this case, the tree itself will depart, and with the onset of heat, the needles will again acquire a beautiful green or blue hue.
- Lack of minerals. Especially on the color of needles affects the lack of magnesium. Branches and tops of spruce, which does not receive enough fertilizer, may turn yellow in summer, spring or autumn.
How to cure?
In order for the tree to regain its former appearance, it is necessary to do certain procedures. So, if small yellow “patches” appeared on the conifer at the end of winter, then it is enough to cover it with special material.
Cotton bags of white color are suitable, which perfectly pass air and reflect the sun's rays.
If the spruce has turned yellow and dried out for other reasons than a sunburn, then you need to pay attention to the following recommendations.
- Do not rush to immediately cut the yellowed branches. In most cases, shoots with needles of a natural shade reappear on them.
- Gently cut dry, lifeless twigs with a hacksaw or cut with pruning shears.
- Treat the spruce with a solution of insecticide and fungicide, which will help get rid of pests.
- Water the plant abundantly, especially if it is likely that when planting you went too far with mineral fertilizers. In addition, it is necessary to add the Zircon ampoule into the water for irrigation, which will act as a root stimulator.
- Until young shoots appear, it is better not to feed the plant.
- In the morning and evening hours, arrange a “shower” for the crown of the conifer.
- Treat the plant with an antistress drug (Epin Extra), which will help the plant recover.
- As soon as the spruce begins to recover, at the end of spring, apply special fertilizers for conifers. Liquid and granular preparations are best suited.
Experienced gardeners claim that in the autumn the needles also turn yellow and dry from old age. The fact is that the needles have their own “term”. After 5 years, they begin to fall off and are replaced by new ones. The picture is as follows: the top of the spruce is decorated with lush green branches, and the lower tiers acquire a yellow tint. This is considered normal and does not require any specific intervention. However, it is still desirable to remove dried branches by cutting them off the trunk.
How to treat yellowed conifers, see below.