They make attractive houseplants, but they can be grown successfully for fruit in the UK too. However, if you’re wanting to grow with the purpose of producing fruit, a variety that is cold hardy will be more likely to give results.
Avocado trees are split into three subspecies – West Indian, Guatemalan or Mexican and it’s said that Mexican types are the most cold hardy. The common avocado that you buy at the supermarket are most likely the variety ‘Hass’, which are from the group of Guatemalan avocados.
Once the plant has been transferred from the water container to a small pot with compost and has reached approximately 30cm tall, it can be cut down to around 15cm. This will encourage the growth to be bushy rather than tall and leggy. Then, once the roots have filled the pot it germinated in, the plant can be transplanted into its final home which should be the largest pot that you have room for in the growing space.
For plants you hope to fruit, providing it with plenty of sunlight, humidity, and fertile soil in an environment like a greenhouse or conservatory will increase the likelihood of fruit.