Why Do My Tomatoes Crack?
- Tomatoes crack (usually) because of changes in watering and weather.
- And yes, some varieties are more prone to cracking than others.
- The earlier the cracking, the worse the crack will be.
- And yes, you can still eat cracked tomatoes.
Causes of Cracks in Tomatoes
A change in the growth rate of the fruit.
If you hold back the water, the fruit tends to toughen up a bit in response and then you pour the water to the plant, the skin can’t expand as fast as the plant wants it to – crack. This can happen naturally if you don’t water when there is no rain. Or you are watering but not “quite” enough and then a downpour soaks the soil, the plant absorbs all it can take and “crack”.
Wide fluctuations in temperature.
This results in the same kind of growth. (Slowing down – toughening skin and then hot and fast growth again)
A period of cool, overcast weather followed by lovely sunny heat is sure to crack fruit that’s prone to it.
Plants that are overfed nitrogen are more prone to cracking.
So if you over-fertilize, you’re creating your own problem.
A little known cause is overwatering where the fruit doesn’t have enough leaf cover.
In other words, the fruit is sitting out in the full sun versus one in the shade of tomato leaves. The one in the sun will tend to crack before the shaded one. This happens more often with marginal cracking conditions.
As usual, there are no instant cures, there is only the tried and true:
- Feed properly.
- Water properly