GP Starter 12-22-10

GP Starter 12-22-10

GP SPORT • UF PREMIUM TECHNOLOGY

Professional starter fertiliser with a high phosphate content for new turf and renovation

Short description: product section

GP Starter 12-22-10 is a professional starter fertiliser designed for new lawns, overseeding after scarification and turf laying. The exceptionally high phosphate content (22 % P₂O₅), combined with iron (2 % Fe), strongly promotes root development and rapid establishment of young grasses. UF technology (urea formaldehyde) releases nitrogen gradually, providing even nutrition to young turf for up to 6 weeks.

The product is designed for professional care of sports pitches, golf courses and intensively used green spaces, as well as high-quality prestigious, ornamental and domestic lawns.

Key properties

Professional starter fertiliser for turf establishment and renovation;

Exceptionally high phosphate content (22 % P₂O₅), the highest in the GP Sport line;

Iron (2 % Fe) ensures intensive, deep turf colour from the first days;

Nitrogen in UF technology (urea formaldehyde), with biologically regulated, gradual release;

Promotes rapid rooting of young seedlings and root system development;

Suitable for overseeding after scarification or aeration and for turf laying;

Effective for up to 6 weeks after a single application;

Low in chloride, safe for young, sensitive plant tissue.

Professional starter fertiliser with phosphate and iron

GP Starter was developed for a crucial stage in turf life: new establishment, renovation overseeding or turf laying. The NPK 12-22-10 formulation, with 22 % phosphate (P₂O₅), deliberately focuses on root system development, the key factor determining successful turf establishment.

Phosphorus is essential during establishment. It participates in plant energy metabolism, nucleic acid synthesis and root meristem development. A strong phosphorus supply at this stage directly influences rooting speed, stress tolerance and sward stability in the following weeks.

Nitrogen (12 % N) is deliberately reduced compared with typical maintenance fertilisers. During establishment, excessive nitrogen encourages above-ground growth at the expense of roots. GP Starter supplies nitrogen at an optimum level for rooting, with part bound using UF technology (urea formaldehyde) to ensure gradual, biologically regulated release.

The formulation also contains potassium (10 % K₂O), strengthening young plants against stress, and iron (2 % Fe), a key macroelement involved in chlorophyll synthesis and enzymatic processes. Added iron ensures intensive, deep turf colour from the first days after application, an aesthetic advantage when establishing prestigious lawns.

The product is low in chloride, an important safety factor for young, sensitive tissues particularly susceptible to root-zone salinity.

How does UF technology work?

UF technology (urea formaldehyde), known in German as Formaldehydharnstoff, is an advanced nitrogen form with slow, biologically controlled release.

In GP Starter, part of the nitrogen is bound in long polymer chains formed by synthesising urea and formaldehyde. Release is biologically regulated: soil bacteria and fungi gradually break down the chains, releasing plant-available nitrogen. The rate depends on soil microorganism activity, soil temperature and moisture.

GP Starter contains nitrogen in two forms:

Ammonium nitrogen (12 % N), immediately available to support young seedlings during the first days after application;

Nitrogen in UF form (urea formaldehyde), released gradually over up to 6 weeks.

This mechanism supplies young turf with nitrogen at a rate matching its actual needs, without excessively stimulating above-ground growth at the expense of roots.

Results of UF technology

Even nutrient supply to the young sward during rooting;

Stable development without growth surges that could weaken young seedlings;

Reduced nitrogen leaching losses, particularly important during establishment before the root system is fully developed;

More efficient nitrogen use by the developing root system;

Lower risk of local over-fertilisation;

Predictable agronomic results throughout the effective period.

Applications

Establishing new turf from seed;

Renovation overseeding after scarification or aeration;

Starter fertilisation when laying turf;

Recovery of a thinned sward;

High-quality sports, golf, ornamental and utility turf.

GP Starter: application and parameters

Application rate and coverage (25 kg)

Application instructions

Prepare the ground, ensuring the correct soil structure and moisture for new establishment.

Calculate the area to be fertilised and measure the appropriate quantity of fertiliser at the chosen application rate.

Spread evenly, preferably using a calibrated spreader, before or immediately after sowing.

When laying turf, apply the fertiliser to the prepared area before laying.

Water generously after application (5–10 mm) to activate nutrients and support germination or rooting.

Good professional practice

Apply alongside turf establishment or renovation, avoiding a prolonged dry period without irrigation.

Do not apply to frozen, waterlogged or severely dried-out soil.

Provide regular, moderate irrigation during rooting.

The high phosphate content means no additional phosphate is required in subsequent maintenance applications.

The next fertilisation (GP Klassik or GP Allround) should follow after 6 weeks.

Application conditions

Do not apply during frost, drought or strong sunlight. Do not exceed the recommended rate. Note: the product contains iron. Avoid application near light-coloured surfaces (paving, façades, wood) because permanent staining may occur. Immediately remove residual granules from paths, shoes and pets' fur.

Declared composition

Role in the GP Sport programme

GP Starter opens the professional GP Sport maintenance programme during establishment and renovation:

New establishment / overseeding / turf laying → GP Starter: high phosphate, rooting, up to 6 weeks

Spring / summer / autumn → GP Klassik: universal seasonal fertiliser, colour, up to 3 months

All season → GP Allround: balanced NPK formulation + trace elements, up to 3 months

Summer / early autumn → GP NK: high potassium without phosphate, up to 3 months

Late autumn → GP Finale: highest potassium with magnesium, winter hardening, up to 2 months

Frequently asked questions

When should GP Starter be applied? During any operation establishing or renewing a sward: new sowing, renovation overseeding after scarification or aeration, or turf laying. The product can be used throughout the growing season, from spring to autumn.

Why does GP Starter contain so much phosphate? Phosphorus is essential during establishment, participating in plant energy metabolism and determining root development speed. A strong supply during rooting directly influences establishment success and subsequent stability. The 12-22-10 formulation deliberately emphasises phosphate while reducing nitrogen, which should not dominate during establishment.

Does the turf need watering after application? Yes, more generously than with maintenance fertilisers. Irrigation of 5–10 mm is recommended to activate nutrients and support germination or rooting.

How long does GP Starter work? Up to 6 weeks. Afterwards, move to a GP Sport maintenance fertiliser, GP Klassik (universal) or GP Allround (with trace elements), according to turf condition and season.

Can GP Starter be combined with overseeding after scarification? Yes, this is a main application. GP Starter is ideal alongside overseeding after scarification or aeration. High phosphate promotes rooting of young seedlings, while UF technology ensures even nutrition during development.

Does the product contain chlorides? No, GP Starter is low in chloride. This is important for young, sensitive tissues susceptible to root-zone salinity. The low-chloride formulation allows safe use even in moist soil immediately after sowing.

Is GP Starter suitable for domestic lawns? Yes. It performs well in all turf establishment and renewal operations, from new sowing and renovation overseeding after scarification to turf laying. High phosphate and iron ensure rapid rooting and intensive, deep colour from the first days.