How to Get Rid of Aphids and Spider Mites — Home and Natural Methods

Aphids and spider mites are the two most common pests faced by anyone from the owner of a single monstera to a gardener tending a rose bed. The good news: both can be brought under control with home methods if you act early. The key is identifying which one you’re dealing with, since the strategies differ somewhat.

Aphids — identification and control

Aphids are small, soft-bodied insects (green, black or pink) that feed in clusters on young shoots and the underside of leaves. They secrete sticky honeydew, on which black sooty mould settles.

How to control them, step by step:

1. Rinse with water. A strong jet of water knocks off most aphids — sometimes that’s enough on its own.
2. Potassium or soft soap. Spray the plant with a solution (a few grams per litre), especially the undersides of leaves. Repeat every 3-4 days.
3. Allies. In the garden, ladybirds and lacewings can clear a plant on their own — don’t kill them off with insecticides.
4. Don’t over-fertilise with nitrogen. Lush, sappy shoots are an aphid delicacy.

Spider mites — a sneakier opponent

Spider mites are tiny arachnids that are harder to detect. They give themselves away through greying and speckling of the leaves and, in heavy infestations, fine webbing. The key difference from aphids: spider mites love dry, warm air, which is why they attack houseplants en masse in winter, close to radiators.

How to control them:

1. Raise the air humidity. This is the most important step — misting, a humidifier, moving the plant away from the radiator. Humid air alone slows spider mites down.
2. Rinse the leaves, especially from underneath.
3. Potassium soap or oil-based preparations, repeated every few days (the eggs are resistant, so one treatment isn’t enough).
4. Remove heavily infested leaves.

Prevention that saves you work

• Inspect your plants regularly, especially the undersides of leaves — early detection is half the battle.
• Quarantine new plants. Freshly bought specimens can “bring in” pests to the rest of your collection.
• Don’t over-fertilise. Moderate feeding produces tougher, less vulnerable tissue.
• Keep humidity up for houseplants in winter — the best shield against spider mites.

Which plants are especially vulnerable

• Rose — a classic aphid target on young buds.
• Monstera and fig — spider mites and other houseplant pests, especially in winter.
• Peppers — aphids and spider mites under cover cultivation.

You’ll find the full list of pests with descriptions and control methods in the pest encyclopedia.