What is the best fertilizer for asparagus?

When to fertilize asparagus

Asparagus needs to be fertilized when the buds begin to sprout in spring every year, which is beneficial for the asparagus to absorb the fertilizer. 60% of the annual fertilizer application should be applied at this time in combination with ridge spreading.

When caring for asparagus, topdressing is generally needed once every 20 days or so. The topdressing fertilizer can be applied in several times. The types of fertilizers used for topdressing are mostly quick-acting nitrogen fertilizers, potassium fertilizers and a small amount of phosphorus fertilizers. The amount applied each time should not be too much. In the middle and early stages of vigorous growth, it can be applied in 3-4 times.

What fertilizer to use for asparagus

1. When fertilizing asparagus, calcium phosphate, magnesium, trace elements and other fertilizers in chemical fertilizers should all be applied as base fertilizers. Spring fertilizers should be applied when the spring buds begin to sprout and grow every year, and the ratio of nitrogen, phosphorus and potassium should be 5:4:4.

2. The best phosphorus fertilizer for asparagus is superphosphate, which contains not only phosphorus, but also calcium and sulfur, which are also essential nutrients for the growth of asparagus. Potassium fertilizer is better.

Asparagus Fertilization Method

The methods of fertilizing asparagus include applying spring fertilizer, rejuvenation fertilizer, autumn fertilizer and topdressing fertilizer during the harvest period to promote the growth of asparagus. These are more practical application methods, but the amount of fertilizer must be controlled and not too much fertilizer should be applied.

Asparagus fertilization precautions

1. When fertilizing asparagus, attention should be paid to the combination of nitrogen, phosphorus and potassium. If there is a lack of nitrogen, the tender stems will easily harden. If the soil lacks phosphorus but there is too much nitrogen fertilizer, the tender stems will become hollow and bitter. It is also not advisable to apply too much acidic fertilizer.

2. The last top dressing of asparagus each year should be completed within 2 months before the frost. If the top dressing is done late, it will easily cause the plants to grow too tall, affecting the growth and yield of the plants in the following year.