Garlic infusion for the garden is one of those old, simple tricks that works year after year in our climate – especially during humid periods when plants start suffering from fungal diseases or pests.
The idea is straightforward: garlic contains powerful sulfur compounds and essential oils that many microorganisms and unwanted guests simply dislike. In the garden, this means less mildew, less damage, and less need for chemicals.
Garlic in the garden – why does it work?
Garlic is not “magic”. It is a chemically active plant. When crushed, it releases substances with a strong aroma and antibacterial / antimicrobial properties. That’s why garlic solutions are commonly used:
- against fungi (for example, powdery mildew),
- against certain pests (as a repellent or disruptive factor),
- for prevention during warm and humid weather.
Garlic tea concentrate against mildew
If mildew appears on cucumbers, phlox, asters, delphiniums or other plants, garlic tea concentrate is one of the simplest home remedies. The key is correct proportions and avoiding overly strong solutions.
Recipe: garlic tea concentrate
- 10 g fresh, finely chopped garlic
- 1 l hot (but not boiling) water
How to prepare
- Pour 1 l of hot (not boiling) water over the garlic.
- Leave to infuse for about 24 hours.
- Strain, pour into a dark bottle and store in a cool place (cellar or refrigerator) for up to 3 weeks.
- Before use, dilute with settled rainwater at a ratio of 1:3.
- Pour into a sprayer and spray the plants.
When and how often to use?
- For prevention in humid weather – once every 4–5 days.
- If mildew is already visible – 2–3 treatments at 3–4 day intervals, observing plant reaction.
- Spray in the evening or on cloudy days to avoid leaf burn.
Fermented garlic infusion as a fungicidal aid and pest deterrent
Fermented garlic infusion is a “stronger” option – it is fermented, more potent, and smells exactly like garlic infusion. In practice, it is used both against mild fungal pressure and as a deterrent for certain pests.
Recipe: fermented garlic infusion
- 500 g fresh, finely chopped garlic
- 10 l water
- Fermentation container (barrel or bucket kept outdoors)
How to prepare
- Place the garlic in a container and pour over 10 l of water.
- Leave outdoors to ferment until bubbling starts. Depending on weather, this takes 1–3 weeks.
- Once the liquid clears, strain through cloth.
- Before spraying, dilute with settled rainwater at a ratio of 1:10.
- Spray soil and lower plant parts (avoid excessive leaf wetting).
What can it help with?
- Fungal pressure (e.g. mild grey mould, mildew – as a supportive measure).
- Pests – sometimes used against onion fly.
Important: where garlic concentrate is not suitable
Garlic solutions are not universal. For some plants they may be too strong or undesirable.
- Not suitable for peas, beans, lupins and cabbages.
Practical tips for better results
- Start with a test: spray one plant or branch, wait 24 h and check for leaf damage.
- Avoid direct sun: evening application is safest.
- Don’t mix everything together: avoid combining many “folk recipes” if you want clear results.
- Hygiene matters: remove heavily infected leaves, improve airflow, avoid watering foliage.
Garlic tea is a gentle, fast aid for prevention and early symptoms, while fermented garlic infusion is a stronger tool that should be diluted and used thoughtfully. In the garden, consistency beats one-time “miracle sprays”.
