Beneficial Plant Sprays

Here are 2 quick and easy sprays that you can make at home.

I’ve used them for years, but there are no trials to show definite proof that they work. Therefore, I would call them beneficial sprays for the amateur gardener to try as an experiment, see if they help you on your plot. Nice people at DEFRA, please don’t come after me…..

Garlic spray


Good for any insects that suck sap, or as an anti fugal.

120g Minced garlic

2 Tbsp Mineral oil

20g Soap powder

1/2 Litre Water

Mix all the ingredients together and leave it to mature for a couple of days.  Strain and use as desired.

Diallyl disulphide and diallyl trisulphide, which are abundant in garlic, irritate and can be deadly to insects.  The mineral oil and soap powder help the spray stick to the insects and the leaves of the plant.

Neem Leaves
Neem Leaves

Neem spray  (Azadirachta indica)

Used to control insects which suck sap, or eat leaves. Neem leaves are placed around affected crops in its native India, but now we can buy the oil as easily as we order our shopping online. Neem is also a natural anti fungal.

2 Tbsp Neem oil (available online, or at most health food shops)

1 Tsp Lavender oil

1 Tsp Rosemary oil

2 Tbsp Fairy liquid

2 Litre warm water

Mix all the ingredients in an old 2 litre soft drinks bottle.  You may have to warm the neem oil in a bowl of hot water before it becomes liquid, it solidifies quickly.  The spray can be used straight away.

Neem is a natural anti feedant and repellent. There are properties to neem which make insects forget to eat, and if they do, the taste is unpleasant to them.  It also suppresses the hatching of insect eggs, this results in the ones that do hatch, being deformed and dying off.  Neem spray isn’t a ‘knock down’ spray that kills insects off instantly, it creates an environment that insects can’t survive in.  They die off after that generation (usually the timespan of 2-3 days).  I use this spray daily in my greenhouse, the addition of the lavender and rosemary oil make the entire greenhouse smell beautiful, they also makes the spray stick to the plants.


2 thoughts on “Beneficial Plant Sprays

  1. I used the garlic spray for the first time two years ago, works like a dream Rob. Good suggestions, too many chemical based products out there.


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