How to grow Agastache rugosa? Detailed guide to planting methods and planting time
When planting Agastache rugosa, it is best to choose loam or sandy loam soil with medium-to-high fertility for planting, and control the temperature at 18-25°C, apply some nitrogen fertilizer, phosphorus fertilizer, and potassium fertilizer appropriately, control the amount of watering well, take good drainage measures, and promptly remove weeds from the garden, and it can grow healthily. When planting, it is best to plant from late March to early April in spring or from September to October in autumn, and when sowing, try to open shallow furrows for sowing.
When planting Agastache rugosa, you should also pay attention to the following points:
1. Temperature: Agastache rugosa has the characteristics of liking high temperatures and liking sunlight. Generally, the annual average temperature for planting Agastache rugosa should reach about 19-26°C. The temperature suitable for the growth of Agastache rugosa is 15-25°C, and when emerging, the temperature of the planting site should be maintained between 20-25°C. The temperature for later growth should not be lower than 16°C, and at the same time should not be higher than 35°C, otherwise it will affect the growth rate and may even cause Agastache rugosa to stop growing.
2. Water and fertilizer management: For fertilizing Agastache rugosa, the best effect is generally achieved with complete fertilizer, that is, each fertilization should be complete, including nitrogen fertilizer, potassium fertilizer, phosphorus fertilizer, organic fertilizer, farmyard manure, etc., applied in a certain amount at a fixed time. Second, when fertilizing, it should be combined with watering and intertillage, which is conducive to the absorption of nutrients, while maintaining soil moisture and maintaining the water supply needed for the normal life of the plants. Finally, note that when there is a lot of rainfall, drain water in time to prevent flood damage.
3. Plant density: Generally, for spring sowing, the sowing amount per mu is generally 500 to 800 grams, while for autumn sowing, the sowing amount per mu is 500-600 grams. From the above sowing amounts, it can be seen that the density of autumn sowing is greater than that of spring sowing. The row spacing for spring sowing is generally between 25-30cm, while the row spacing for autumn sowing is generally between 30-35cm.
4. Pest and disease control: This is a point that requires great attention during the planting process. The main diseases of Agastache rugosa are wilt disease, angular leaf spot, brown spot, and spot blight. We can use carbendazim, Bordeaux mixture, metalaxyl mancozeb, and ridomil for control. The most harmful pests are red spiders, silver-marked leaf moths, leaf rollers, cutworms, mole crickets, etc. Generally, acaricides and trichlorfon are used for poisoning and killing them.