Old sponges, don’t throw them away: “they’re worth gold” | I always use them like this in the garden

Why It Works:
The sponge fragments create tiny air pockets, improving:

Oxygen flow to roots

Drainage

Soil structure

3. Water Locks for Seed Starting Trays
Starting seeds takes patience — and the right moisture level.

Step‑by‑Step:
Place a thin sponge layer beneath potting mix in the tray.

Add seeds and water gently.

The sponge keeps moisture even and steady.

Result:
Seeds germinate faster and more consistently.

4. Slow‑Release Hydration Discs for Hanging Baskets
Hanging baskets dry out faster than most gardens.

How to Use:
Wrap old sponge pieces in breathable fabric or mesh

Tuck them around the root ball

Benefits:
Reduces watering frequency

Protects roots from extreme drying

5. Trap Moisture in Raised Beds
Rain doesn’t always reach deep soil layers.

Method:
Place large sponge pieces in deeper sections of the raised bed.

Cover with soil.

Outcome:
Sponges act like hidden reservoirs — storing rainwater and releasing it slowly.

6. A Natural Mulch Booster
Sponges help mulch hold water longer.

What to Do:
Scatter shredded sponge pieces on top of the soil

Cover with organic mulch

Why It’s Useful:
The sponges soak up dew and irrigation

They reduce evaporation from the soil surface

7. DIY Plant Watering Stakes/Pods
Your watering stake can be homemade with sponges.

Make Your Own:
Take an old plastic bottle.

Fill with torn sponge pieces.

Poke holes in the cap.

Insert into the soil near roots.

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