Hi Swalsh26,
Still having problems with your plants? What I understood from your post is... You have some bugs in the potting soil, you've had a lot of rain and some of your plants aren't thriving. Correct? Sounds like pretty typical problems we all face from time to time. Sometimes we figure it out and sometimes we don't. But I can at least make some observations and suggestions.
Too many bugs in the soil can be a real issue. You might want to try a soil drench to get rid of them. Shouldn't hurt the plants and might help a lot. You can use a variety of things. I have used permethrins at times and neem oil at times and hydrogen peroxide on occasion. Do some research, choose one and follow the instructions. Dilute them with plenty of water according to the label and see what happens. I would try one on one plant and then check the soil a day or two later.
Too much rain. Boy I wish I had that problem. However, if the roots aren't drying out enough then they aren't getting enough oxygen and can severely stunt your plants. I would find a way to cover the tops of the pots to keep some of the water out. Because eventually the roots will rot and the plant will die.
And plants not thriving. That's more complicated. If you've been growing plants on your deck for several years and they have mostly done well then we can assume they have plenty of sunlight and great temps to grow. Then my focus would be on the soil. If you get rid of the bugs and dry them out some that might solve the problem. But plants need lots of good minerals to grow and good fungus and good bacteria. Lots of potting soils just don't have what it takes so you might want to amend them with some good fertilizer or compost or worm castings. Hope this helps. Please let us know how you're doing.
