There is no ideal size to a pot - it is, however, important to select a pot that is a bit wider and deeper than your previous pot. You need to give the roots a bit more space than before to grow.

Carefully remove your tree from its previous container and gently loosen the roots that may have compacted along the edges and the bottom. This will stimulate new growth.

Combine a well trusted potting soil mix with some compost and a handful of bonemeal and mix it all together with some water to increase the moisture in the mix.

Handle your tree with care and place it in the center of your new pot. Whilst holding the tree upright, fill the pot with your newly made potting soil mix all around the root ball. Use your hands to softly tamp the soil as you go along and make sure to leave about a 3cm gap between the soil surface and pot edge.

Add a good layer of mulch to ensure water retention in the soil. Water your newly planted lemon tree well and continue to water regularly in the following week. Pat yourself on the back for a job well done!