Zucchinis grow fast and they can get to a massive size before you notice them if they’re hidden underneath the leaves. When the plants are spaced correctly it’s easier to get in amongst the plants to harvest the zucchinis without damaging other plants. Overcrowded zucchini plants are more likely to develop fungal diseases like powdery mildew because there isn’t enough air circulation between the plants. Zucchini plants that are spaced correctly have plenty of room to grow and don’t have to compete for resources with other plants, which leads to a higher yield. Benefits of proper zucchini spacing include Higher yield
If you’re sowing zucchini seeds directly in the garden you can plant them closer together and then thin them out to the desired spacing once they get to one inch (2.5 cm) tall. Zucchini ( Cucurbita pepo) plants are large and need plenty of room to spread out, so leave about 20 to 24 inches (50 to 60 cm) between each plant.
