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in Fruit & veg
The skins on my tomatoes are often tough. Doesn't seem to matter which variety I grow. Am I over feeding them? (I use tomorite). I grow them in pots not grobags.
Tough skins usually means thick skins, Phil. Some varieties, thanks to their genes, just have thicker skins than others. The plum varieties - San Marzano, etc - are an example. What are you growing?
That said, it's been known for toms of any variety to thicken their skins in hot weather or if there's been a shortage of moisture. It's a kind of defence mechanism to preserve their inner moisture.
Out of interest, how often are you feeding?