Can you help me regarding bone meal? Can I use it and how (for tomatoes, peppers, melons, cucumber and grapes)? And also, what is the best feeding for grapes and can it be bought on the high street and supermarkets? Thanks for your help.
The easiest method to add phosphorous to your plants soil is to use Bone Meal.
Adding good organic compost to your soil around the plants will also help.
Follow the directions on the packaging for the Bone Meal product that you choose.
I generally scatter the recommended amount and rake into the top soil. Then water in.
Here are some articles with more information.