How Do I Know When My Apples Are Ready to Harvest?

The question of when to pick apples trips up many home growers. Colour change is not a reliable indicator — many varieties turn their full red or gold weeks before they are ready to eat. Size alone is not reliable. The reliable tests are based on the changes happening inside the fruit as it ripens: starch converting to sugar, ethylene production rising, and the connection between the stalk and the spur weakening. Learning these tests makes harvest timing accurate regardless of variety.

The easy-release (lift and twist) test

Cup an apple in your palm and lift it gently, twisting slightly as you raise it. If it releases cleanly and easily from the spur with a short, smooth movement, it is ready to harvest. If you have to pull firmly or the apple clings tenaciously to the spur and the stem bends or the spur tears, it is not yet ready. Repeat this test daily on a different apple from different parts of the tree — within a day or two of ripeness, the whole tree will release easily. This test is fast, free and requires no equipment.

The starch-iodine test

Cut an apple in half horizontally and brush the cut surface immediately with dilute iodine solution (1% potassium iodide solution). The iodine reacts with starch and turns dark blue-black, while areas that have converted starch to sugar remain cream-yellow. An unripe apple is almost entirely dark blue; a fully ripe apple is almost entirely cream. Most growers harvest when the starch-iodine reading shows the fruit is 75–90% converted — fully cream may indicate over-ripeness in some varieties.

Seasonal timing

Early varieties (Discovery, Beauty of Bath) ripen in late July to August and have a very short pick window of one to two weeks. Mid-season varieties (Cox, James Grieve) ripen September to October. Late varieties (Bramley, Granny Smith in warm climates) ripen October to November and keep well into spring. Knowing your variety's approximate season helps narrow down when to start testing.

After picking

Early varieties do not store well — eat within days of picking. Late varieties store best: wrap individually in paper, place in a single layer in a cool (3–4°C), dark location, and check regularly. Never store damaged or bruised fruit with sound fruit.