Sun

They prefer full sun but in the warm areas of the country will handle some shade. 

Water

Need watering regularly especially during summer. Water newly planted trees once or twice per week deeply.

Soil

To ensure successful fruiting, plant in well-drained fertile soil. Incorporate a good compost and keep mulched.

Fertilizer

Citrus are heavy nutrient feeders, use a high nitrogen NPK fertiliser. Apply 200g at the drip line (2/3 in spring and 1/3 in summer) increasing this by 200g per year until you are applying 2kg. Apply manure in the autumn spread under the tree with mulch.

Wind

Not very wind tolerant but reasonably tolerant to salty marine conditions. 

Frost

Cold tolerant to - 5°C. More hardy once established.

Fruiting

1-3 years after planting for grafted plant

Pruning

Citrus are not trained to any particular shape, some varieties do not need any shaping at all. Prune to shape if necessary and any dead or diseased branches. They will tolerate heavy cutting back. Also remove any sucker growth.