赞比亚采购需求：二倍体西瓜种子，大号西瓜种子，二倍体西瓜种子

I'm looking to source a variety of watermelon and zucchini seeds for our upcoming growing season. Specifically, I need different types that are suitable for diverse climates, as well as options that can yield high production. We're interested in both organic and conventional seeds, so please provide information on what you can offer in terms of quality, pricing, and availability. Additionally, it would be great if you could include any certifications for the seeds, along with detailed specifications such as germination rates and growth characteristics. If there are any bulk purchase discounts or special promotions available, please let me know. Looking forward to your prompt response with your product catalog and pricing options!