尼日利亚采购需求：散叶生菜种子，红叶生菜种子，叶类蔬菜种子

I'm interested in purchasing okra seeds and would like to gather some additional details. Specifically, could you provide info on the average yield per plant in kilograms? Additionally, I'd like to know the typical time frame from planting to harvest and the duration of the harvesting period. I'm looking to order around 20,000 seeds, so any insights on growth cycles, care requirements, or best practices for successful cultivation would also be appreciated. Thank you!