Growing watermelons during summer requires adequate sunlight, warmth, nutrition, and moisture. They should be planted with ample humus. Proper spacing depending on the variety is essential. Planting should take place once the soil warms up to 70° F. Use trellising to conserve space for smaller varieties. The fruits should be harvested when ripe, as they don’t post-harvest ripen. Challenges include controlling pests and diseases that can be mitigated through plant care and using resistant varieties.