House & Garden Top Booster (250ml / 500ml / 1L)

What is House & Garden Top Booster and what does it do?

Top Booster is a high-strength PK bloom additive (similar to PK 13/14) with added iron. It promotes mid-flower bulking, stronger bud set, and helps plants stack more effectively. The iron supports chlorophyll function during this energy-intensive bloom phase. When used correctly, it can improve density, vitality, and contribute to better final quality.

When should I use House & Garden Top Booster?

Use it for one week during mid-flower—typically 3–4 weeks before harvest. For an 8–9 week flowering cycle, that’s around week 4 or 5. Timing is key: too early or too late reduces effectiveness or risks stressing the plant. Only use it once per run, and stop well before flush.

How do I dose and apply House & Garden Top Booster?

Use at 1.5 mL per litre of water. For example, that’s 15 mL in 10L or 150 mL in 100L. Most growers include it in every feed that week. After the one-week window, return to your usual feeding plan. A flush is still recommended before harvest.

Can I use Top Booster in soil, coco, or hydroponic systems?

Yes—Top Booster works in all growing media including soil, coco, hydroponics, DWC, and autopot setups. Just ensure proper mixing and line maintenance. In systems like DWC or drip irrigation, keep the reservoir clean, cool, and avoid letting solutions sit too long.

Does Top Booster affect EC or pH?

Yes—it raises EC noticeably, so reduce your base nutrients accordingly. Always check and adjust pH after mixing. Target EC should include Top Booster, so measure again after adding it. Improper EC and pH are common causes of burn or lockout.

What’s the correct mixing order for Top Booster?

Mix silica (if used) into water first, then base nutrients, then Top Booster. Mix thoroughly between each step. Never mix concentrates together directly. Check EC before and after Top Booster, then adjust pH as the final step.

Can House & Garden Top Booster cause nutrient burn?

Yes—especially if base nutrients are too strong or the plant is already stressed. Watch for tip burn, overly dark leaves, stalled growth, or rising runoff EC. Always use Top Booster on healthy plants and avoid stacking it with other bloom enhancers.

Can I use Top Booster with other additives?

Don’t stack it with other PK boosters like Canna PK 13/14, Top Shooter, or Shooting Powder. Use Top Booster on its own in mid-bloom, then optionally follow with a finisher product (like Shooting Powder) in late bloom—never both at once. Silica and Cal-Mag can be used if needed, but monitor EC.

Is Top Booster safe for all types of flowering plants?

Yes—it can benefit any flowering or fruiting plant when timed correctly. Autoflowers require careful timing based on their actual mid-bloom, not fixed weeks. Outdoors, use lighter doses and ensure you can control feeding conditions to avoid overdoing it.

What sizes does House & Garden Top Booster come in?

Common sizes include 250 mL, 500 mL, 1L, 5L, and larger. If you're trialling it, a small bottle is enough—since it's only used one week per cycle, it lasts longer than most expect. Store it sealed, cool, and out of sunlight. Shake well before use.