The lack of water of the past three years, 2015, 2016, 2017, accentuated by the stifling heat and a drying wind, can be seen in the grilled foliage of trees and shrubs that were thought to be resistant to scorching summers. Symptoms of water stress are frequent on young plants but also on old ones. , dry branches or even a dead plant in already unfavorable situations:draining, sloping, windy soils...
We must add to the suffering of a lack of water, certain parasites which do not fail to attack weakened plants, incapable of setting in motion their own natural defense. It is then that fungi, bark beetles, and other xylophagous insects have a field day.
It all depends on the magnitude. If only the leaves are dry, even in the case of evergreen plants, there is no immediate danger. Only the aesthetic side took a hit. But you have to make sure that the wood is not dry. By scratching the bark of the twigs, if a little green appears, there is still life in the wood. Otherwise, cut! And this, until we find green wood.
If your plant looks completely fried, scratch the bark a little at the foot. However, if in doubt, wait until spring. Observe then, where the new shoots leave and you will prune what is dry next. Here again, it is urgent not to rush too much.
In the case of yews, cherry laurels (called laurel almond in the South), or even oleanders, a clear cut can be considered. The plant is shortened to 20 cm from the ground. Do not try with the cypresses of Provence or the pines, it does not work.
To restore strength and vigor to plants that have undergone this climatic phenomenon, add compost and/or organic fertilizer. Do not force the doses. The plant needs to start without being "pushed" with fertilizer, which would weaken it even more.
Water well, of course. And to limit this kind of jokes that are sure to happen again, mulch the very base of trees and shrubs that are already well established.
Increased verification of plant health is strongly recommended. A fragile plant attracts trouble...
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