Here is a simple diagram that rocks pebbles in the bottom of your pot creates a 'perched water table' closer to the roots which increases the chance of rot. It's a myth that Two young watermelons growing upright on a trellis Stock Photo Alamy The 8 Best Drought TOlerant ANnuals Dengarden Garden Obelisk Trellis for Climbing Plants and Elegant Outdoor Decor Macy's Bell & Howell 9 Watt Equivalent 220 Lumen Bionic Grow 4 Head Full Spectrum UV Indoor Plant Light, 3,700K at Tractor Supply Co Crops in pots: success with vegetable container gardening