Grow until spring onion size
Plant in a location that enjoys full sun and remember to water moderately. Keep in mind when planting that Ishikuro is thought of as hardy, so Ishikuro will tend to go dormant or grow slowly over the winter months. Ensure your soil is loamy and sandy and has a ph of between 6.0 and 7.0 as Bunching onion is a weakly acidic soil to neutral soil loving plant.Sow direct spacing 10 cm in the autumn for a winter crop or in the spring for summer use. Or four or five seeds per module, to be planted out at 10 cm intervals
Look to ensure a distance 3.9 inches (10.0 cm) between seeds when sowing - bury at a depth of at least 0.23 inches (0.6 cm) deep. Soil temperature should be kept higher than 13°C / 55°F to ensure good germination.By our calculations, you should look at sowing Ishikuro about 28 days before your last frost date.
Plant out from modules spacing every 10cm
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Ishikuro is a hardy plant.Harvest once the onion reaches spring onion size
This variety tends to be ready for harvesting by mid summer.Spring Onion