Give yourself time. Observe, try, step back, learn, enjoy, observe, wait, try, enjoy, try again. It's OK. to make mistakes. Learn from them. Enjoy.

Omar

Could be a lot of things. How close are things planted? Could be a case of competition induced destruction. Things will grow nicely, until they get big and rub shoulders with the plant nextdoor. Is the soil moist? Dry soil is the quickest way to kill things. Well, besides frost. Adequate soil depth? In a shallow bed, big plants will bottom out their root systems, and die. Sounds like your larger plants are the ones suffering.

If you're able to post some pics it might help narrow things down a bit. As dan mentioned, it could be a lot of things and pictures can give more clues. Veggies can be tough- a lot of variables come into the play. Everything from the timing of the planting, to the types chosen, to spacing/sun/soil depth. What zone/area are you in?

Lisa

Get your soil tested by your county agent. What was your watering pattern. When in the day? I never had luck with strawberries. We don't have enough information to be of any real help. Maybe too much fertilizer.What exactly did you do to the soil to fertilize it. Photographs and detailed info including when you planted things. Are you aware that your county puts out a planting schedule. Google "(your county's name )planting schedule" and see what comes up.