Welcome to garden.org, Christina. Lucky you, having lovely Bletillas already established in your garden.
As far as the vegetables go, as Daisy already said they do require a lot more sun than it looks like they're going to get where they are. They are planted very close to the base of a tree on the left. Unless the sun gets to them for most of the day, I think your vegetable garden is somewhat doomed to failure, sadly.
Veggies require a generous soaking of water every day, preferably early in the morning, to produce. Those plants are very hard working, to make a harvest. Besides the sun and water, you also need to give them good rich soil and fertilizer of some sort. This is where the tree roots present the problem as they will invade the space where the veggies are, attracted by the water and fertilizer. Your plants will get going then slowly peter out as the tree roots invade and steal their goodies.
If you can possibly move some of those plants, either into containers or another spot in the garden away from the trees you might have a lot more luck.
