You dig the hole, you plant the seeds, and you sit back and watch. When is harvest time? Gardens take patience, and veggies don’t grow overnight. But why drag out the process? Certain vegetables grow faster than others, so if you’re feeling antsy, buy the seeds that’ll be ready for harvest in three weeks flat. eBay has a slew of healthy suggestions that’ll be ready in no time at all – some as quick as 20 days!