What must I do to make the fruit on my grapefruit tree sweet? It is bitter now.
How to Make Grapefruit Give Sweet Fruit
Certified GKH Gardening Expert
Most grapefruits are generally on the 'tart' side naturally, though the red/pink varieties are sweeter. Sometimes you can try increasing the fertilizer and making sure the soil is slightly acidic, around 6.5. This should sweeten the fruit. This article will help too: https://www.gardeningknowhow.com/edible/fruits/grapefruit/growing-grapefruit.htm