Lemon Peels, cats and Gardens
Citrus scents make cats cower and sneeze, so toss a few lemon or orange peels in the garden and your cat problem will be solved. The peels are not harmful to other plants in the garden and are completely biodegradeable so you can put them in the garden and forget about them.
Aphids are also repelled by citrus. Mix the grated rind from a lemon with water and spray it on any plants that are being attacked by the little bugs!