I was growing melons but the land crabs loved them. As to tomatoes , there is a hybrid out now that is bred for tropical climates and it does really well in San Pedro. It also tolerates the salt pretty well. The problem when it is really hot is that you get flowers but they do not bud in to tomatoes easily. Ash helps a but when mixed in the soil and water water water. Oh, and do not plant next to habaneros or you get hot tomatoes.