How is tansy used against mice? - briefly
Dried tansy leaves or powdered herb are spread near entry points, cabinets, and walls to repel mice with its strong, unpleasant odor; a diluted spray of tansy essential oil can be applied to the same locations for added deterrence.
How is tansy used against mice? - in detail
Tansy (Tanacetum vulgare) contains volatile oils and bitter compounds that repel rodents. The plant can be employed in several practical ways to deter mice from homes, sheds, and gardens.
First, fresh or dried foliage may be placed in areas where activity is observed. Crushed leaves release a strong odor that mice find unpleasant. A small bundle of dried stems, tied with twine, can be hung from rafters, stored in cabinets, or positioned in corners of closets. Replace the material every two weeks to maintain potency.
Second, a tincture or spray can be prepared by steeping chopped leaves in high‑proof alcohol for several days, then filtering the mixture. Dilute the extract with water in a 1:4 ratio and apply to entry points, baseboards, and the interior of traps. The liquid coating creates an olfactory barrier without leaving visible residue.
Third, powdered tansy may be scattered along mouse pathways, such as behind appliances, beneath shelves, or around holes in walls. The fine dust adheres to fur and paws, discouraging further travel. Use gloves to avoid skin irritation and keep the powder away from pets and children.
Fourth, planting tansy around the perimeter of a property adds a living deterrent. The plant thrives in sunny, well‑drained soil and can be spaced 12–18 inches apart. Mature bushes produce abundant foliage that can be harvested periodically for the methods above. Companion planting with rosemary, mint, or lavender enhances the overall repellent effect.
Safety considerations include the plant’s toxic sesquiterpene lactones, which can cause skin irritation and, if ingested in large amounts, liver damage. Wear protective gloves when handling fresh material, store preparations in sealed containers, and keep them out of reach of animals.
Effectiveness varies with infestation level. Tansy works best as a preventive measure or for low‑grade activity; severe infestations typically require mechanical traps or professional extermination in conjunction with the botanical approach. Regular monitoring and replacement of the repellent material are essential to sustain results.