You can start yellow squash seeds indoors using a heat mat to encourage germination. Once the seedlings sprout and grow a few sets of leaves, move them outdoors. Keep the soil moist and provide 6–8 hours of sunlight daily. When direct sowing round zucchini seeds, plant them about 1 inch deep in well-drained soil. Space them 18–24 inches apart to allow for healthy growth and plenty of room for the plants to spread.

To harvest squash wait until they are about 6 to 8 inches long and still tender. Use a sharp knife or scissors to cut the squash from the plant, leaving a small portion of the stem attached. Regular harvesting encourages more production, so keep an eye on your squash and harvest them before they become overly large and tough.