Do not plant until the temperature has warmed up and settled-after last frost date. For direct seeding, plant 5-6 seeds @ one inch deep in a circle @ eight inches in diameter. Thin to 2-3 plants. Growing cucumbers on a trellis (sow 1 seed/2", thin to 6") will keep your long cucumbers such as our Abruzzo straight and they are easier to find. For melons, consider using black plastic mulch for added heat (and weed control). You can start both of these as transplants, but like squash, these resent having the roots disturbed so be careful when transplanting.