200pcs/bag common onion seeds Normal vegetable red bulb onion seed

Product Description

200pcs/bag common onion seeds Normal vegetable red bulb onion seed

MOQ 1 bag  (200pcs seeds/bag), it for planting

Bulbs use for vegetable food 

Nutritious plants

Hybrid type 

•  The red bulb onion seed for sale 
•  Non-GMO 
•  Non radiated
•  Only natural dried by sunshine and wind
•  100% Natural raw 
• We have more than 2000 kinds seeds for sale, you could check on this shop or contact us for more.

(1) temperature

Onion has strong adaptability to temperature. The seeds and bulbs can germinate slowly at 3 ~ 5 ℃, and begin to accelerate at 12 ℃. The suitable temperature for the growth of seedlings is 12 ~ 20 ℃, the leaves are 18 ~ 20 ℃, and the bulbs are 20 ~ 26 ℃. The strong seedlings can withstand the low temperature of 6 ~ 7 ℃. Higher temperature is required for bulb expansion. Bulbs cannot expand below 15 ℃, and 21 ~ 27 ℃ is the best. If the temperature is too high, the growth will decline and go into sleep.

(2) illumination

Onion is a long sunshine crop, which needs more than 14 hours of long sunshine at bulb expansion stage and bolting and flowering stage. Under the condition of high temperature and short sunshine, only leaves grow, and onion cannot be formed. The suitable light intensity of onion is 20000 ~ 40000 lux.

(3) moisture

Onion should be supplied with sufficient water during germination, seedling growth and bulb expansion. However, water should be controlled during seedling stage and before overwintering to prevent seedlings from overgrowth and suffering from freezing injury. Irrigation should be controlled 12 weeks before harvest to enrich bulb tissue, accelerate maturation and prevent bulb cracking. Onion leaves are drought resistant, suitable for 60% ~ 70% humidity, and high air humidity is prone to disease.

(4) soil and nutrition

Onion has strong adaptability to soil. It is suitable to use fertile, loose and well aerated neutral loam. Sandy loam is easy to obtain high yield, but clay loam has rich bulbs, good color and storage resistance. The ability of onion root to absorb fertilizer is weak, and sufficient nutritional conditions are needed for high yield. Every 1000 kg of onion needs to absorb 2 kg of nitrogen, 0.8 kg of phosphorus and 2.2 kg of potassium from the soil. The application of trace elements such as copper, boron and sulfur can significantly increase yield.