How to Grow Zucchini Hydroponically

Use a 1/4-inch drill bit to drill small drainage holes into the bottom of the bucket. Scatter about 10 to 12 holes over the area. Don't make any more than that or the water will drain out too fast.

Fill the bucket about three-quarters full of clay pellets or pea gravel. This is the support media that will hold your zucchini plant into place. There are other things you can use for hydroponic growing, such as perlite, but gravel and pellets work well for zucchini because they make the bucket heavy enough to support a large plant. Use only sterilized media so that no diseases are transmitted to your plant. Clay pellets specifically produced for hydroponic use are available at virtually any hydroponics supply store. These pellets hold water around the roots better than the pea gravel, so your plant can make better use of the water and nutrients.

Plant the zucchini seedling in the center of the growth media. Bury the roots carefully so as not to crush them. Keep the entire stem above the gravel or pellets to avoid stem rot.

Place the bucket in a sunny outdoor location. The plant should get at least six hours per day of full sun. This particular hydroponic system uses the flow-through method, so the surface underneath the bucket should either absorb the excess liquid or allow it to flow away from the bucket.

Pour hydroponic nutrient solution into the bucket. You can get concentrated nutrients from a hydroponics supply store, then mix with the appropriate amount of water as indicated on the label. Use enough so that the level of the liquid comes almost to the top of the growth media, but stops about an inch or so below the surface. Prevent the growth of algae in your hydroponic bucket by keeping the top of the pellets dry.

Feed the zucchini plant three to four times per day, depending on the size of the plant and the weather conditions. The plant can go for longer periods of time without water when grown in clay compared to pea gravel.