This is a great thread because I have a few gardening anxieties. Some stem from just having bought this home in December 2015 and not done any serious gardening since I lived in Michigan 10 years ago.
1) That I won't give the plant enough light/I will kill it with too much light or heat
2) Newfound fear: Rabbits and my daylilies. I actually woke up at 5am this morning (thanks to my trusty dog!) to scare off the deer in case they're partially responsible
3) That my plants (or I ) will get eaten by bugs. More the former, long term but the latter in the short term