This all-natural deer repellent lasts up to 3-4 months during the growing season, and up to 6 months over winter. It is most effective because it repels by scent; yet it has a non-offensive odor to people.
The active ingredient is dried blood meal, recognized by the EPA as environmentally safe. OMRI-listed as an organic solution, this was developed for commercial forest planting in Sweden, but is now produced in the U.S. It's rainfast in 24 hours. Repels deer, rabbits and elk. Plus, it acts as a foliar feed fertilizer on many plants.
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