Annaffiare le piante con il caffè?

1. Liquid Coffee: An immediate boost

The coffee left in your cup contains dissolved minerals that the plant can absorb immediately.

The Dilution Rule

Never pour pure espresso at the base of a plant! It's too acidic and too concentrated. High doses of caffeine can inhibit growth.

The Right Recipe: Always dilute your coffee. Use about 1 part coffee to 4 parts water in your watering can.

⚠️ What to avoid

• Never use hot coffee: It would cook the roots. Wait until it has cooled.
• Never use sweetened coffee: Sugar attracts gnats and ferments in the soil (mould).
• Never use flavoured coffee: Artificial flavourings (vanilla, hazelnut) are chemicals that are harmful to the soil.

2. Coffee Grounds: The protector

The wet powder remaining in the filter is very different from the liquid. It is organic matter rich in nitrogen.

Its 3 superpowers:

1. Enriching the soil: Work it into the top layer of soil. As it decomposes, it slowly releases nitrogen.
2. Repelling pests: Sprinkle it around the base of the plant. Ants, slugs and snails dislike its granular texture and smell.
3. Composting: It is an excellent compost activator. If you have a worm composter, the worms love it (in moderation).

3. Which plants like coffee?

Coffee is acidic (pH around 5). Not all plants like it!

✅ Acid-loving plants (They love it)

You can use it generously for:

• Hydrangeas (it enhances their blue color).
• Azaleas and rhododendrons.
• Ferns.
• Rose bushes.
• Tomatoes (coffee grounds at the base help with growth).

❌ To avoid

Avoid giving it to young shoots (it is too strong) or plants that prefer calcareous soils.

It's your turn!

Zero-waste gardening starts with your coffee cup. Once a week, give your plants a little very well-diluted coffee. They will thank you for it.