4. Feed Bananas to Roses
Most gardeners know that banana skins make a good fertiliser for tomatoes, peppers and their solanaceous cousins, but roses love them too. Chop banana skins (up to three) into small pieces and dig them into the soil beneath a rosebush. The banana skins provide 3.25 per cent phosphorus and more than ten times that amount of potassium, spurring the growth of sturdier stems and prettier blooms.