What is Culterra Superphosphate 5kg used for?

It is a granular single superphosphate fertiliser with 8.3% phosphorus, plus calcium and sulphur. Gardeners use it to correct phosphate-poor soil, strengthen roots at planting, and support flowering and fruiting in vegetables, roses, bulbs, trees and shrubs.

How much area does a 5kg bag of Culterra Superphosphate cover?

One 5kg bag treats about 73 square metres when used at typical home-garden rates. For planting holes, use a small handful for seedlings and up to about 600g for larger trees, mixed into the soil at the base of the hole.

When should I apply Superphosphate in South Africa?

Best at planting or in early growth. Spring from September to November suits most regions. Autumn from March to May is good for winter vegetables, bulbs and new lawns. Phosphorus stays where you place it, so work it into the soil rather than only sprinkling it on the surface later.

Can I use Superphosphate on lawns, vegetables and indigenous plants?

Yes. It is suitable for lawns, vegetables, fruit trees, roses, bulbs, ornamentals and many indigenous plants, especially where soils are low in phosphorus. Water it in after application and keep granules off stems and leaves.

Is Superphosphate the same as a complete NPK fertiliser?

No. It supplies phosphorus, with useful calcium and sulphur, but little or no nitrogen. Pair it with compost or a balanced fertiliser if plants also need leaf growth. Do not expect it to green up a lawn on its own.

Superphosphate - Culterra (5kg)

Brand: Culterra
Product Code: 94432144
Availability: 50

R129.00

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Superphosphate 8.3% (5kg) by Culterra | Premium Phosphate Fertilizer.

Name: Superphosphate - Culterra (5kg)
Brand: Culterra
SKU: 94432144
Price: 129.00 ZAR
Availability: InStock

Culterra Superphosphate is a high-quality single superphosphate (SSP) fertilizer containing 8.3% phosphorus (P). It also supplies beneficial calcium and sulfur. This concentrated, fast-acting granular formula corrects phosphorus deficiencies in soil, delivering immediately available nutrients that plants can uptake quickly.

Phosphorus is one of the three essential macronutrients (alongside nitrogen and potassium). It drives energy transfer, root development, flowering, and fruiting in plants.

Key benefits and uses:

Promotes strong root growth: Ideal for newly planted seedlings, transplants, trees, and shrubs to improve establishment and survival rates.
Enhances flowering and fruiting: Perfect for flowers, bulbs, root crops (carrots, potatoes), fruit trees, vegetables, and roses.
Supports overall plant health: Improves nutrient uptake, crop quality, and yields while providing sulfur (great for legumes and pastures) and calcium (for soil structure).
Versatile for South African gardens: Suitable for lawns, indigenous plants, exotics, vegetables, and ornamental beds. It works especially well in phosphorus-poor soils common in many parts of the country.

Coverage: One 5kg bag treats approximately 73m², making it economical for home gardeners and small-scale growers.

How to Use It:

At planting/transplanting (recommended): Mix a handful (about 15–30g for small plants, up to 600g for larger trees) into the bottom of the planting hole with compost or soil. This gives roots direct access to phosphorus for quick establishment.
As a top dressing or side dressing: Broadcast evenly over the soil surface around established plants (avoid touching stems) and water in thoroughly. Apply every 4–6 weeks during the active growing season if needed.
General rate: Follow package guidelines or soil test results. Lightly fork or rake into the top 5–10cm of soil for best results.
Tips: Water after application. Combine with organic matter like compost for balanced nutrition. It can slightly acidify soil, so monitor pH in sensitive areas.

Always wear gloves and follow safety instructions on the packaging. Store in a cool, dry place.

Best Time/Season to Apply in South Africa?

Apply directly at planting or during early growth for maximum root development benefits. Phosphorus is relatively immobile in soil, so incorporating it before or at planting is most effective.

Spring (September–November): Prime time across most regions (especially Gauteng, KwaZulu-Natal, Western Cape). Warm soil and upcoming rains help nutrients integrate as plants enter active growth.
Autumn (March–May): Excellent for establishing winter vegetables, bulbs, lawns, and transplants before cooler weather. It supports root strength ahead of spring flush.
Avoid heavy summer application in very hot/wet conditions (risk of runoff) or mid-winter dormancy in colder areas.

In summer rainfall regions, apply before the rainy season starts. In winter rainfall areas (Cape), align with autumn/spring planting windows.

Why Choose Culterra Superphosphate?

This reliable South African brand delivers targeted phosphorus without excess nitrogen, making it perfect for root-focused or flowering stages. It's a trusted choice for gardeners and farmers seeking better establishment, bigger blooms, and higher yields.

Boost your garden's foundation today... Strong roots lead to healthier, more productive plants!

Frequently Asked Questions

What is Culterra Superphosphate 5kg used for?
It is a granular single superphosphate fertiliser with 8.3% phosphorus, plus calcium and sulphur. Gardeners use it to correct phosphate-poor soil, strengthen roots at planting, and support flowering and fruiting in vegetables, roses, bulbs, trees and shrubs.
How much area does a 5kg bag cover?
One 5kg bag treats about 73m² when used at typical home-garden rates. For planting holes, use a small handful for seedlings and up to about 600g for larger trees, mixed into the soil at the base of the hole.
When should I apply Superphosphate in South Africa?
Best at planting or in early growth. Spring (September–November) suits most regions. Autumn (March–May) is good for winter vegetables, bulbs and new lawns. Phosphorus stays where you place it, so work it into the soil rather than only sprinkling it on the surface later.
Can I use Superphosphate on lawns, vegetables and indigenous plants?
Yes. It is suitable for lawns, vegetables, fruit trees, roses, bulbs, ornamentals and many indigenous plants, especially where soils are low in phosphorus. Water it in after application and keep granules off stems and leaves.
Is Superphosphate the same as a complete NPK fertiliser?
No. It supplies phosphorus, with useful calcium and sulphur, but little or no nitrogen. Pair it with compost or a balanced fertiliser if plants also need leaf growth. Do not expect it to green up a lawn on its own.