Welcome to the new Bridlington and Wolds Scale Model Club forum
The soil in your veg plot is worn out - mine has not been used, so it produces larger veg - that's my story and I am sticking to it.
It could be something that starts with the letter "B" or the letter"S" - I am too polite to guess Now on to the model -some Flory wash on the parsnip and then most removed.