Harvest maturity is the stage of development at which a fruit or vegetable is harvested, determining its final sugar content, acidity, colour, texture and suitability for processing, and is a primary driver of finished product quality.
In trade practice
Suppliers and buyers agree maturity indicators in advance of the season; common parameters include Brix for sugar content, titratable acidity, skin colour assessed against reference charts, and firmness measured with a penetrometer. For IQF berries, harvest maturity directly affects Brix readings at intake and the proportion of defects such as unripe or overripe pieces. Underripe fruit produces pale, acidic product with poor flavour; overripe fruit is soft, prone to mechanical damage and generates higher defect rates. Contracts for fresh-to-frozen supply often include a maturity protocol that the supplier must follow before harvest begins.
In a specification
A specification states the minimum Brix, maximum acidity and colour reference at harvest, and may require the supplier to submit a pre-harvest sample for buyer approval before picking commences.