Ultrasol SOP is a highly soluble, high-purity potassium sulphate fertilizer designed to feed plants during flowering, fruit set and fruit filling. It contains a high level of soluble potassium fortified with sulphur to improve crop quality and the efficiency of vital processes inside the plant. It raises sugar content, improves color and taste, increases fruit size and firmness and improves shelf life during transport and storage, while also improving flowering, fruit set and carbohydrate translocation. It is chloride-free, making it suitable for chloride- and salinity-sensitive crops and protected cultivation, and offers fast dissolution and excellent stability in irrigation systems and mixing tanks, with good compatibility with most mixable fertilizers and pesticides.
Key Features:
- High potassium content to improve fruit quality, size, firmness and taste.
- Contains soluble sulphur that improves nutrient uptake and fertilizer use efficiency.
- Chloride-free, suitable for chloride- and salinity-sensitive crops and greenhouses.
- Raises sugar content and improves natural fruit color during ripening and production.
- Improves carbohydrate translocation from leaves to fruits, tubers and seeds for better final quality.
- Fast-dissolving and high purity; suitable for drip irrigation, foliar spray and center-pivot systems.
Specifications:
- Trade name: Ultrasol SOP
- Manufacturer: SQM
- Product type: Fully water-soluble potassium sulphate fertilizer
- Form: Fully soluble crystals
- Formula: 0-0-51 + 18S
- Total nitrogen (N): 0%
- Phosphorus (P₂O₅): 0%
- Soluble potassium (K₂O): 51%
- Soluble sulphur (SO₃): 45%
- Soluble sulphur (S): 18%
- Physical properties:
- pH (1% solution): 2.5
- Application: Fertigation + foliar spray
- Fast-dissolving, high purity
- Suitable for open-field and protected cultivation
- Suitable for chloride-sensitive crops
- Weight: 25 kg
Directions for Use:
- Foliar feeding
- Crops in early growth and young fruit trees: 0.5% spray solution.
- Dense crops in the vegetative stage and mature fruit trees: 1%–3% spray solution.
- Spray in the morning or evening to improve uptake and reduce the risk of leaf burn.
- Repeat 3–4 times per season as needed.
- Fertigation – greenhouses
- Tomato: 1–3 kg/hectare per application.
- Pepper and eggplant: 1–3 kg/hectare per application.
- Cucumber and lettuce: 1–3 kg/hectare per application.
- Center-pivot irrigation
- Vegetables, potato and forage crops: 1–3 kg/hectare per application.
- Continuous feeding
- Most crops: low concentration of 0.01%–0.1%.
Suitable Crops:
- Tomato, cucumber, pepper and eggplant.
- Potato, field crops and forage.
- Grapes, strawberry, watermelon and melon.
- Citrus, mango, pomegranate and other fruit trees.
- Greenhouse and chloride-sensitive crops.
Precautions:
- Carry out a jar test before mixing with pesticides or other fertilizers.
- Do not mix with calcium-containing products without a compatibility test.
- Spray during mild hours and avoid high temperatures.
- Store in a cool, dry place away from moisture and direct sunlight.
- Use appropriate protective equipment during mixing and application.
Orkida Tip:
- For best results with Ultrasol SOP, apply during fruit set, fruit filling and before coloring. Potassium improves fruit quality, sugar content, firmness and taste, while sulphur improves nutrient uptake and plant activity, especially within a balanced fertilization program that includes calcium and micronutrients across production stages.