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What should I do to stop fruits from bursting open?

Garden Experts
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In my garden, I have one apple quince and one pear quince. The latter bears more fruit than the first, but unfortunately the fruits burst open regularly and then begin to rot. Neither plant is fertilised! Do you know of a remedy?

The GARDENA gardening expert

Dear Mr. K., when intact fruits burst open, this is generally a consequence of sudden, excessive water intake trying to enter tissue which has been kept very dry. You can frequently see the same effect on tomatoes, radishes, horse radish and kohlrabi. For this reason, I assume that your trees are subjected to dryness (whether from the soil or weather conditions). In the coming season, try to keep the plants evenly watered through irrigation as necessary. A sufficient supply of potash is also expedient for improving the cell strength and the water management. Try feeding both trees with a potash fertiliser or compound fertiliser.