Green Planet PK Spike (1L / 5L)

What is Green Planet PK Spike used for?

Green Planet PK Spike is a liquid bloom booster with a 0-14-15 NPK, designed to push flower development, bulking, and ripening during mid-flower. It’s a clean mineral PK spike, not a full bloom base or generic PK 13/14 formula.

When should I start using Green Planet PK Spike, and how long should I run it?

Start around week 2–4 of bloom depending on cultivar. Apply every 2 weeks during mid-flower, and stop about one week before your final flush or finish.

What’s the correct dose and schedule for Green Planet PK Spike?

Use 0.5–1 mL per litre, applied every two weeks during the bloom phase. Always monitor EC and adjust base nutrients slightly to keep your overall feed strength balanced.

Will Green Planet PK Spike raise EC or PPM significantly?

Yes — it can raise PPM by up to 250 depending on dose. Most growers reduce base bloom nutrients slightly on PK Spike weeks to avoid EC spikes or nutrient burn.

What are signs I’ve overused Green Planet PK Spike?

Tip burn, browning edges, stalled uptake, rising runoff EC, or clawing leaves can all be signs of overuse. If in doubt, pause the booster, flush lightly, and resume a balanced feed.

Will Green Planet PK Spike increase yield or fix airy buds?

It can support better flower stacking and heavier buds when used correctly. However, bud density also depends on lighting, genetics, airflow, and harvest timing.

Can I use Green Planet PK Spike in hydro, coco, or soil?

Yes — it’s compatible with all major grow mediums including DWC, NFT, coco coir, and soil. Just monitor EC closely, especially in coco and recirculating systems.

How do I mix Green Planet PK Spike correctly?

Add it after your base nutrients in the feed tank. Mix well, then adjust pH last. Always check final pH and EC to ensure your mix is dialled in.

Can I use Green Planet PK Spike with other nutrients and boosters?

Yes, but stacking with other PK boosters or bloom additives can easily spike EC. Use caution when combining with products like Green Planet Massive or high-CalMag feeds.

Can I foliar spray Green Planet PK Spike or use it in veg?

No — Green Planet PK Spike is not recommended for foliar use or for seedlings/veg stages. It’s formulated specifically for the flowering phase.

Is Green Planet PK Spike safe for edible crops?

Yes — it’s commonly used for tomatoes, chillies, and strawberries. Just use recommended doses and avoid overfeeding or salt buildup in soil or coco.

Which size of Green Planet PK Spike should I buy?

1L is great for small-scale grows and lasts a while. If you’re running multiple tents or larger bloom setups, 5L usually offers better value per use.

Is Green Planet PK Spike good for sterile growing systems?

Yes — it’s a clean, mineral-based PK booster ideal for sterile or low-organic systems where biological additives aren’t preferred.

Do I need to flush after using Green Planet PK Spike?

Not just because you used it. Flushing depends on your full nutrient schedule. If you’ve fed heavy, it’s smart to ease off PK boosters before harvest for a smoother finish.

Is Green Planet PK Spike safe to handle?

Yes — treat it like any concentrated nutrient. Avoid contact with eyes, rinse skin after use, and store securely away from children or pets.