- You will get 110 Seeds of Dark Green Zucchini Heirloom Vegetable Seeds. - Sunlight: Full Sun. - Life Cycle: Annual. - Watering: Medium. - Dark Green Zucchini Seeds. - The delicate flavor, soft shell and creamy white flesh of summer squash is a perfect addition to any summer meal. - While especially plentiful in the U.S. marketplace during the summer months, summer squash is actually available through the year. Summer squashes, members of the Cucurbitaceae family and relatives of both the melon and the cucumber, come in many different varieties. - Alternatively, you can sow the seeds directly outdoors after the threat of frost is past and the soil has warmed up. See the transplanting section for more on planting right into the garden. - Zucchini are sun loving and won’t do well in cold soil. Therefore, plant your zucchini when the temperature of the soil outdoors is at least 55 °F (13 °C). This is normally after the first or second week of spring, after all chance of frost have passed. - If you’d rather not take chances of sowing your seeds directly into the soil, you can start your zucchini seeds indoors 4-6 weeks prior to transplanting them outdoors. Grab seed trays, soil-less potting mixture, and your seeds. Place a single seed in each tray, cover with ⅛ inch of potting mixture, and water well! These should be placed in an area that gets sunlight and is at least 60 °F (16 °C). When the second set of leaves have sprouted, the zucchini starts are ready to be transplanted outdoors. - Outdoor planting: Use a gardening trowel to dig a small hole for your zucchini plant. If you’re planting seeds, you’ll need to stick each seed less than ½-inch under the soil. For zucchini starts, dig each hole to be slightly larger than the root ball on your plant. Keep 75–100 centimeter (39.4 in) space between each plant (same distance for row space). You can thin out seedlings if needed.