How to Use Ammonia in the Garden. Ammonia is an alkaline cleaning solution. It's made from chemical compounds, which are handy in the garden and helpful with several outdoor chores. Keep some household ammonia in the garden shed and garage. Here's a few suggestion to put ammonia to work for you in the garden.
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Keep stray animals away from the trash bins. Spray the lids and outsides of garbage cans with a 50/50 solution of ammonia and water. Spray the trash bags, too, before dropping them into the can for added assurances that prevent raccoons and other pests from rummaging through garbage.
Treat alkaline-living blooming plants with a special shower of 2 oz. of clear ammonia in a gallon of water. Spray clematis, hydrangea, cucumbers and lilac bushes and boost the nitrogen content in the soil too.
Tackle stain on concrete. Mix one cup of ammonia in a gallon of water. Use a stiff brush and scrub the solution into the stain. Hose off the area.
Stop the itch of a mosquito bite. Put a single drop of ammonia directly on the bite to ease the itch immediately.
Clean mildew from unfinished or painted wood furniture. Mix a cup of ammonia, 1/2 cup of white vinegar and 1/4 cup of baking soda in a gallon of water. Sponge the solution onto the furniture and rinse thoroughly. Dry well with old terrycloth towels.
Remove mildew from wicker furniture with a solution of 2 tablespoons of ammonia in a gallon of water. Use a deck sprayer to apply the solution, then use an old toothbrush to get at hard-to-reach areas. Rinse well and air dry. Invert the furniture for a few hours to finish drying.