When planning your vegetable garden and future harvest, you must be sure you estimate the needs of your family correctly – do you know how much vegetables can you actually eat? The greenhouse season should start with planting green vegetables (radishes, spinach, lettuce, green onions etc.) Interesting fact – did you know, that only one tomato seedling in your greenhouse can yield up to 6 kilograms of produce? One seedling of cucumbers – 4 to 5 kilograms, and one paprika seedling – around 2 kilograms.