"Since I started using Calibre (in combination with Sigma silicon), the blueberry fruits became heavier by about 10 - 15% in relation to volume, as well as their flavour bouquet (not just sweetness) is greater. I also noticed that stored fruit, even at room temperature, stays fresh longer. During the harvest season, we test our crops in this way. Once ripe, the fruit can also hang on the bush longer without falling off, while retaining its firmness."