Paclo – Paclobutrazol

Paclo Turf Growth Regulator (250 g/L Paclobutrazol)

Paclo is a professional-grade turf growth regulator designed for the suppression and long-term control of Annual Poa (Winter Grass) in cool-season turf. Containing 250 g/L Paclobutrazol, Paclo helps reduce Poa infestations while improving turf quality, colour, and playability.

Commonly used in greens, fairways, and high-performance sports turf situations, Paclo also regulates growth by reducing vertical height and encouraging desirable turf species to dominate.

Where Paclo Can Be Used

• Paclo is suitable for:
• Bentgrass (Agrostis spp.)
• Perennial Ryegrass (Lolium perenne)
• Kentucky Bluegrass (Poa pratensis)
• Blends containing Fine Fescue and Tall Fescue

This makes it ideal for mixed cool-season lawns and turf in New Zealand, especially where Annual Poa suppression is required.

Application Rate

7.5–15 ml per 100 m²

Always water in with 4–6 mm irrigation immediately after application

Key Benefits of Paclo

• Suppresses and controls Annual Poa (Winter Grass)
• Reduces vertical turf growth
• Improves turf density, colour, and overall quality
• Enhances performance of cool-season grasses
• Reduces seed-head visibility when timed before emergence

Top Tips for Using Paclo

Water in immediately: Apply to wet or dry turf, then irrigate with 4–6 mm.

Timing matters: Apply 1–2 weeks before Annual Poa seed-head emergence for best visibility reduction.

Expect results: Poa growth slows within 1–2 weeks; higher rates may cause temporary yellowing or browning of Poa.

Blend management: Overseeding helps desirable grasses replace weakened Poa. Wait 14 days after application before overseeding. For new seedlings, delay Paclo use until turf is established (minimum 6 weeks after seeding).

Seedling establishment: Avoid applying before heavy rainfall or irrigation events; wait at least one month after application before planting new seed.

Avoid tank mixes: Do not mix with Group 3 fungicides (DMIs such as propiconazole, tebuconazole, triadimenol, triticonazole).

Temperature caution: Do not apply when daytime highs consistently exceed 32°C, or when turf is stressed by heat, cold, drought, or saturated soils.

Turf health: Avoid use on turf weakened by insect damage, disease, or recent renovation until recovery is complete.

Professional Use in NZ

Paclo is a proven tool for turf managers, greenkeepers, and serious lawn enthusiasts who want stronger cool-season turf and reduced Annual Poa competition. Correct use improves playability, consistency, and overall turf health throughout the growing season.