Yeast against various plant diseases?


Did you know that yeast may be your powerful ally? We all know that yeast is needed in the kitchen, especially for baking, worried help us to create fluffy and tasty delicacies. But yeast can also help you in the garden. It actually has a “double effect”: firstly, it supports growth of plants and secondly, it protects plants from diseases, especially from various moulds and fungi. You can also use yeast as a cheap alternative to more expensive chemical fertilizers. Yeast fertilizer is friendly to the environment and to humans of course.

Yeast in the garden

Yeast is made up of simple organisms that feed on simple sugars. Thanks to quick formation of colonies and roots of these microorganisms, other pathogenic microorganisms are displaced or simply “pushed away” and this how yeast is able to protect plants from diseases such as gray mould, powdery mildew or black mould caused by Alternaria fungus . Yeast colonies do not harm plants – on the contrary, they help plants absorb nutrients from the soil. Yeast also contains a number of beneficial substances such as vitamin B, proteins, amino acids and minerals (magnesium, potassium, calcium, phosphorus, iron, chromium and zinc). Fertilizers made from yeast are particularly suitable for young seedlings, as yeast promotes root development and therefore helps seedlings to grow better.


Photo: Pixabay

Yeast spray

Spray made from yeast works well against fungal diseases such as gray mould or potato mould. It is also widely used by gardeners on strawberries, tomatoes and cucumbers, but it may be used on all plants. Mix 100g of yeast and 500ml of milk (3.2%). Stir well. Yeast must fully dissolved. Now dilute with 10 l of water. Spray on both sides of leaves and apply once a week. Make sure there is no wind or rain forecast.

Unfermented yeast fertilizer

This fertilizer strengthens plants, but it also protect plants from diseases. You need about 100 g of baker’s yeast (equivalent to about four standard-sized cubes) and 10 l of lukewarm water. Mix both ingredients and let it sit for an hour. Use this mixture for watering. You can prepare this type of fertilizer from old yeast too.

Fermented yeast fertilizer

This fertilizer is stronger than the previous one. Grate 100 g of yeast and add a cup of sugar. Let it work for two hours and then pour in 10 litres of water. Mix everything well and let it ferment for a week. The volume may increase significantly! Mix one cup of fertilizer with 10 litres of water. Use this mixture to water indoor and outdoor plants.


Preview photo: Pixabay

Radek Štěpán

Gardening is my hobby, I have a lot of experience and I am happy to share it.


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