Both zucchini and squash require warm soil and a sunny position with fertile soil to do well. Direct sow (1.3cm deep) or use 4-5 week old transplants with 4-5 seeds in a circle (thin to 2-3) for zucchini, and in hills or rows for squash. Transplants should be grown in 10-15cm pots by planting 3-4 seeds and thinning to 2).
As for zucchini, cucumbers and melons will only do well in warm weather and can be grown from transplants although, like zucchini, they resent root disturbance. For direct seeding plant 5-6 seeds 2.5cm deep in a 25cm circle and thin to 2-3plants. For trellising, thin the plants to 15cm in rows.