Plantskydd works by emitting an odor that animals associate with predator activity, repelling the animal before it nibbles on plants. The odor is not unpleasant to the applicator. Research has proven this is more effective than other repellent systems-where the animal needs to taste treated plants before being repelled. Plantskydd stimulates a fear-based response which will have animals looking for somewhere else to dine. Plantskydd's long-term effectiveness is attributable to the tenacity of its 100% natural, vegetable oil binder in sticking to plants, even under severe snow/rainfall conditions-up to 6 months over winter, 3-4 months in summer. 1.3 gal. / 5 litre. Ready-To-Use Jug. treats 400 - 600 plants 1 ft. high.