Advice on planting a lemon tree

[RobertLT]

this was a good post talking about fruit trees

Buying fruit trees

Better to buy and plant trees in autumn, not spring. Essential to keep them well watered for at least 2 years and it’s more difficult to achieve that through a hot summer. The shock of replanting may mean that older fruiting trees take longer to recover. Young trees quickly catch up.

There are other posts on this site that talk about Fruit Trees and planting them so do a search and you will get about 15-20 posts giving advice