FertiGreen | Thom-Ka® (pick-up only)

Thom-Ka® (Thomas-Kali) is a potassium-rich fertilizer often containing some magnesium and sometimes calcareous components. It is mainly used to strengthen plants and improve their winter hardiness.

• Stronger plants: Potassium strengthens cell walls and improves resistance to diseases, drought, and frost. Plants remain sturdier and less limp.
• Better flowering and fruiting: More and larger flowers and a higher yield for vegetables and fruits. Better taste and storage quality.
• Increased winter hardiness: Ideal as an autumn fertilizer. Lawns and perennials will get through winter stronger.
• Extra magnesium: Promotes chlorophyll and prevents yellowing of leaves. Ensures a deep green color for lawns.
• Suitable for potassium-demanding crops: Safe for potatoes, fruit trees, brassicas, and lawns.
• Cheaper than sulfate of potash magnesia and more suitable for larger areas.

Especially suitable for:

• Lawns (autumn application)
• Potatoes
• Fruit trees
• Brassicas
• Sandy soil (often potassium deficient)

Good to know

Thomas-Kali usually contains less magnesium than sulfate of potash magnesia and is not always completely chloride-free. For sensitive plants (such as grapes or some fruit varieties) and potatoes (early varieties and baking varieties), sulfate of potash magnesia is often a better choice.

This product is weighed for you and delivered without its original packaging. The quality and weight have been carefully checked, so you receive the product safely and correctly. Please note: the packaging may differ from the image.

Application and dosage

Autumn (September–November) – most important time

• For lawns, perennials, and ornamental shrubs
• Increases resistance to frost and diseases
• Ensures stronger cell walls

 Spring (March–April)

• As a supplement for crops with high potassium demand
• For example, in vegetable gardens or for fruit

Lawns

• Autumn (September–November): 30–50 g/m²
• Spring (April–May): 20–30 g/m²
• Tip: spread evenly and then lightly rake in or water.

Garden and ornamental plants / perennials

• Per m² or per plant: 20–40 g/m² around the roots
• Spread in autumn for winter hardiness or in spring as a supplement.

Vegetable garden / crops

• Potatoes / brassicas / tomatoes (if not sensitive to chlorine): 25–35 g/m²
• Fruit trees (if not sensitive to chlorine): 50–100 g per young tree, older trees 150–200 g per tree

 Tips

• Do not spread too much at once → risk of salt damage.
• Thomas-Kali contains chlorine → do not use on sensitive plants such as potatoes (baking varieties and early varieties), tomatoes, grapes, fruit varieties. In such cases, use sulfate of potash magnesia instead.
• Can be combined with other fertilizers (N and P) for balanced nutrition.

Composition 

PK 8-15(+6MgO): PK fertilizer containing natural phosphate with magnesium

8% P₂O₅ Phosphoric anhydride for Garden and Lawn

• of which 3% P₂O₅, phosphoric anhydride soluble in mineral acid
• of which 5% P₂O₅, phosphoric anhydride soluble in neutral ammonium citrate and water - of which 4.5% P₂O₅, phosphoric anhydride soluble in water

15 % K₂O, potassium oxide soluble in water

6 % MgO, magnesium oxide