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Onion & Mint Mix: Add a handful of fresh mint leaves during the simmering stage. The mint boosts insect-repelling properties while reducing the strong onion smell.
Onion Vinegar Blend: Add 2 tablespoons of apple cider vinegar for a longer-lasting effect and mildew prevention.
Fermented Onion Spray: For a more potent version, let the onion-water mix ferment for 2 days before straining. This can increase effectiveness against stubborn insects.
FAQ
Q: Which pests does onion spray repel best?
A: Onion spray is especially good for repelling aphids, whiteflies, thrips, spider mites, and even soft-bodied insects. It may also deter larger pests like rabbits and deer when combined with garlic or cayenne.
Q: Is onion spray safe for all plants?
A: Most vegetables and ornamentals tolerate onion spray well. However, avoid using it on delicate flowers or seedlings without testing a small patch first.
Q: How long does the spray remain effective on plants?
A: The effectiveness usually lasts 2–3 days outdoors, depending on weather conditions. Reapply after rainfall or heavy irrigation.
Q: Can I use onion spray indoors for houseplants?
A: Yes! Just make sure to ventilate the area afterward — the smell can be intense in enclosed spaces.
Q: Will the smell attract or repel pets?
A: Most pets dislike the strong scent and will stay away. However, avoid spraying directly where they eat or sleep.
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