Need to find the culprit
I don't know if it's bugs, birds, or bad luck. I'm new to gardening and can't seem to figure out what is killing my plants. Last year it was my zucchini. Had three really good sized plants, started to fruit, then something ate the base of the plant Right at the level of soil, a clean cut. Each one, with about a week in between. This year it's been my sunflower, and all but one of my bleeding hearts. Ive looked at the plants and there is nothing noticeable, never noticed any sort of bug hanging around, just ants. I live in MD and have pretty sandy soil. I'm not sure if this is enough info, I'd be happy to give more. Just trying to figure out what this is so it doesn't wreck my tomato plants or peppers.