Fertilizing onions includes: base fertilizer, first follow-up fertilizer, and second follow-up fertilizer:
Base fertilizer is applied to the planting beds before planting or during soil preparation, about 1–3 days before planting.
Follow-up fertilizer is applied at 10–15 days after planting and again at one month (30 days), using 100ml per plant for each application.
👉 Mixing Ratio:
1 bottle cap (10ml) mixed with 4–5 liters of water
(Use a more diluted solution to avoid leaf burn)
🕒 Spray Frequency:
Spray every 7–10 days
Apply in the early morning or late afternoon
Make sure to cover both the upper and lower leaf surfaces
👉 Mixing Ratio:
1 bottle cap (10ml) mixed with 2 liters of water
🕒 Dosage & Timing:
Basal Application (before planting):
Apply diluted solution evenly to the soil 1–3 days before transplanting or sowing
First Topdressing:
10–15 days after planting, apply 100ml per plant around the base
Second Topdressing:
Around day 30 after planting, apply another 100ml per plant