You didn't say if you have plants to transplant or will be direct sowing them in your garden from seed. Your page & post doesn't state what zone you are in, so I don't know when your last expected frost date is, but melons are a very warm season crop, so should not be planted until ABOUT 3-4 wks after your last average frost date. I believe it really is based on soil temp., I think about 60 degrees or higher. If you do a search in the form below entering "planting watermelon" or something of that nature I know the answer is out there, 'cause I've searched it myself b4. Someone else may post to your question that will be able to help you more specifically.