Leek species: New seeds must be used in the year when planting, otherwise it is difficult to emerge and it is difficult to survive after emergence.
Eggplant species: Valid for 6 years.
Welsh onion species: New seeds must be used when planting. If you use Chen seeds, onion trees will be very small and will affect the yield and quality of Welsh onion.
Cucumber seed: valid for 3 years, Chen seed germination rate is low.
Pepper seeds: The effective period is 3 years. Seeds that exceed the valid period not only reduce the emergence rate, but also the quality of the seedlings that are produced.
Cabbage species: valid for 2 years.
Celery species: Valid for 5 years. The seeds of the year cannot be planted, otherwise it is not easy to emerge.
Tomato species: Valid for 4 years.
Cowpea species: Valid for 3 years.
Coriander species: Valid for 3 years. The new seeds of the year cannot be planted and must be kept for 1 year before planting.
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