Lithothamne algues marines 800 g CP Jardin

Lithothamnium seaweed 800 g

Rich in nitrogen
For ornamental shrubs
For 7 to 15 m²

€8.90

In stock

Delivered in 1–3 days

Free shipping from €49

100% secure payment

Delivered in 1–3 days

Lithothamne or Maërl: a classic in organic gardening for living soil

CP Jardin lithothamne is a calcareous seaweed of marine origin, naturally rich in calcium (CaO: 42 to 47%), magnesium (MgO: 6 to 8%) and more than 30 trace elements. This 100% natural mineral concentrate is a tremendous soil amendment, used for generations in vegetable gardens to rebalance soils, strengthen plants, and improve their resilience.

By activating microbial life and remineralizing tired soils, lithothamne promotes the uptake of essential nutrients. It works gently, without scorching, and helps crops thrive more healthily. It is an essential ally in organic gardening.

The benefits of CP Jardin lithothamne

✔ Excellent pH corrector for acidic soils

✔ Boosts plants’ natural resistance (diseases, stress, pests)

✔ Reduces the risk of blossom-end rot (black bottom in tomatoes)

✔ Remineralizes the soil sustainably without imbalance

✔ Improves soil structure and stimulates microfauna

✔ Made in France 🇫🇷, no additives, no synthetic products

10 uses in the vegetable garden 🌿

1. Amend the soil: enriches poor or acidified soils, encourages beneficial bacteria.
2. Coat seeds: improves germination thanks to trace elements.
3. Root dip (praline) the roots: boosts the recovery of transplanted seedlings.
4. Treat vegetables: limits the development of diseases on tomatoes, cabbages, beets, etc.
5. Cover vegetables in the cellar: prevents the spread of fungi during storage.
6. Maintain tomato stakes: limits contact diseases via the soil.
7. Fight weeds: especially horsetail (Equisetum arvense).
8. Activate compost: speeds up decomposition and balances C/N.
9. Feed young rhubarb plants, strawberry plants…: promotes vigor without excess nitrogen.
10. Help green manures: as a supplement, strengthens winter cover crops.

Directions for use

1 handful = 40 to 50 g

Soil maintenance: 20 to 30 g / m² to broadcast
Foliar dusting: 10 g / m² on dew, morning or evening
pH correction (acidic soil): 50 g / m², scratch into the soil then water

Repeat 1 to 2 times per year, preferably in spring or autumn. It can be supplemented with an application of marine guano or organic fertilizer depending on the crop’s needs.

Summary of uses for CP Jardin Lithothamne

Use	Recommended dose	Period
Soil amendment (maintenance)	20 to 30 g / m²	Spring / autumn
pH correction (acidic soil)	50 g / m²	Before planting or at the end of winter
Foliar dusting (diseases)	10 g / m²	On dew, morning or evening
Root dipping (praline)	Add to the root-dip mixture	At planting time
Seed coating	In a thin layer	Before sowing
Composting	2 handfuls / compost layer	All year round

Frequently asked questions about lithothamne

➡️ Can lithothamne scorch plants?

No, lithothamne works gradually and presents no risk of scorching, even on young plants.

➡️ Can it be used with other fertilizers?

Yes! It can be combined with guano, compost, or manure to round out the nutrient supply depending on needs.

➡️ Is lithothamne useful in pots or planters?

Absolutely. In small amounts, it improves the structure of the substrate and limits potting-soil acidification.

➡️ How many times per year should I use it?

Once or twice a year is enough: at the start of the season (March–April) and/or in autumn (September–October).

When to use Lithothamne?

J F M A M J J A S O N DIdealPossible

Regulatory information: Basic mineral fertilizer NFU 44-001 Calcium carbonates of natural origin. Maërl or Lithothamne fine powder, sprayed. 43% total magnesium oxide (MgO) combined in the carbonate state. Neutralizing value: (NV) = 52%. Grinding fineness: 80% minimum passing through a 0.315 mm sieve. Carbonate solubility of the amendment = 75%. Fast-acting amendment.