HOW TO PLANT
After sowing the purple onions, sprinkle chopped straw on top and water thoroughly. After 7-15 days, the seeds germinate and need to be watered daily with enough water to soak in. When the purple onions are 3-5 cm tall, gradually remove the layer of straw covering the bed and prune out weak and damaged plants.
Dosage includes 15-20 tons of manure/ha; 180-200 kg of urea; 400 kg of superphosphate; 200 kg of potassium sulfate. Water 1-2 times/day for the first 10 days. From 11 days onwards, water 2 times/day. The amount of water varies from 400 - 600 liters/time. Stop watering 1 week after harvest.
After about 100 days of planting, the bulbs turn red and the leaves have turned 80%, then you can start pulling them out. Purple onions should only be harvested on dry days. Pull the bulbs, shake off the soil, put them in a basket and move them to a storage location. Purple onions can be put in a mesh bag, kept in a dry place or wrapped tightly in a bag and stored in the refrigerator.