How quickly does asparagus grow?
When established, an asparagus crown – the base of the stem with all roots attached – can produce a crop for as many as 20 years. Asparagus needs two years to establish and from the third season onwards you can expect 20 to 25 succulent spears per plant.
When and where to plant:
Asparagus crowns should be planted from March into April. Asparagus plants will do best in a sunny, wind-sheltered spot. Avoid ground that’s previously had asparagus or potatoes, as this may encourage pests and diseases.
Preparing the soil for asparagus:
Asparagus can grow in any free-draining soil that has lots of fresh compost dug in, but the vegetable thrives in sandy substances that are slightly alkaline. Use a soil-testing kit to work out the pH level of your soil, adding lime if needed to make it less acidic.
How to plant asparagus:
Dig small trenches about 12inches (30cm) wide and 8inches (20cm) deep. Along the bottom of the trench, make a gap 3inches (8cm) wide for the roots to spread over.
Plant asparagus crowns 12inches (30cm) apart and cover them with only 2inches (5cm) of soil. Water and keep watered during dry conditions. Fill the trench in fully in the autumn, after the first season has finished.
Asparagus crowns can be grown in large containers, patio grow bags or gro-beds for up to five years after planting.
