We have moved into a rental that has a lemon tree in the backyard. I have noticed that the blossoms are coming out in clusters. Should they be thinned out?
You can thin them if you want to, if the tree's not too big. However, the tree itself will usually drop many flowers, and even small fruit, before it arrives at a good number that it can develop to maturity. This article has more information: https://www.gardeningknowhow.com/edible/fruits/lemons/growing-meyer-lemons.htm