The final size of a fruit tree is dependent on several factors:
- Selected rootstock: The vigor of a fruit tree is mainly determined by the rootstock onto which it is grafted. Dwarf rootstocks have weaker root systems and grow into smaller trees than vigourous rootstocks.
- Vigour of the variety chosen: Some varieties are more or less vigourous than others when grafted onto the same rootstock. The size guides on our product pages indicate the height and spread based upon the vigour of each variety.
- Soil conditions: Less than ideal soil conditions can reduce growth. Note that all fruits trees will not do well on poor, shallow soils.
- Geography: Where you are in the country, latitude and altitude. Fruit trees grown in northern exposed areas on poor soils will always be less vigorous than those grown in more favourable areas.
- Pruning regime/training method: In a set time, trees pruned or trained will not reach the same size as those free growing.
Choose your rootstock with your chosen varieties, training method and your location in mind.
Common rootstocks for apple trees include M27 (very dwarf), M26 (semi-dwarf) and MM106 (semi-vigorous).
Common rootstocks for pear trees include Quince C (dwarf) and Quince A (semi-vigorous).
Common rootstocks for cherry trees include Gisela 5 (dwarf) and Colt (semi-vigorous).
Common rootstocks for plum trees include Pixy (dwarf) and St. Julien A (semi-vigorous).
Diagram Of Various Vigour Apple Trees On Different Rootstocks
Light green=low vigour Medium green=medium vigour Dark green=High vigour