Iris has a strong ability to adapt. The native place is at a relatively high altitude. It can withstand the cold and survive in some harsh environments.There are many varieties of iris, not all varieties are cold-resistant, such as the cold resistance of German iris is poor, most of the varieties are cold-resistant, can grow in the cold northern region, suitable for planting in the northern region, generally safe overwintering, some varieties can also grow in Russia.If you like this kind of flower, you can buy it and cultivate it at home.
1. Black rot: Improper maintenance of iris may cause disease. Fungal infection may cause black rot, which will damage the leaf part, cause disease spots on the leaf, and eventually cause the leaf to dry up and fall off.In the initial stage, attention should be paid to the treatment of the disease, which can be sprayed with 402 antimicrobial emulsifiable concentrate.
2. Seed ball rot disease: This disease mainly damages the seed ball part, causing the plant to become low.There are many reasons for this disease, such as the invasion of pathogens or the over-drying of soil.Air humidity should be kept well, less than 70%, and air circulation should be paid attention to when storing seed balls.
3. Root rot: Problems in maintenance may cause iris to be infected with root rot. This disease often occurs from March to May every year. It will harm the roots and gradually cause root rot.Appear after this disease, should be timely treatment, available 0.3% of Tuzet to irrigate the roots.
