PK 13 -14

Learn when to apply your PK 13-14 fertilizer, how to adjust the EC, and which stimulators to combine it with to maximize density and resin. Complete your purchase with substrates, and measuring instruments for a professional result.

What is PK 13-14 and why does it make a difference?

The PK 13-14 is a mineral supplement that concentrates phosphorus (P) and potassium (K) in optimal proportions for the flowering phase. Phosphorus drives flower formation and energy transfer, while potassium regulates key metabolic processes and the compaction of floral tissue. Using a good PK 13-14 fertilizer at the right time accelerates bud swelling, improves density, and can promote resin production without saturating the plant with nitrogen.

When and how to use PK 13-14 fertilizer

The general rule is to introduce PK 13-14 when the flowers are already formed and ready to gain weight. In organic soils and substrates, it is usually applied in the last third of flowering for 1–2 weeks; in coco or hydroponics, it can be slightly advanced and maintained for 2–3 weeks with gradual doses. Start with a low input and increase according to the plant's response, monitoring the EC of the solution to avoid overdoing it.

Practical tip: mix the supplement after your A+B bases or flowering fertilizer, measure pH and EC, and adjust. Avoid overlaps with other high P/K products on the same day to not "spike" the solution. If you are growing very greedy strains, distribute the weekly dose over alternate waterings and finish with a flushing period or reduction of salts before harvest.

Compatibilities and combinations that work

The PK 13-14 combines very well with a flowering base fertilizer rich in micronutrients, and with flowering stimulators (bud igniters) as long as you do not double the P/K input in the same mix. In aerated substrates, adding enzymes helps keep the roots active and better assimilate minerals. In coco or hydro, good pH control (approximately 5.8–6.2) and a progressive EC are key to avoiding blockages.

How to choose the best PK 13-14 for your crop

• Concentration and purity: stable, soluble formulas that are easy to dose in watering or reservoir.
• Compatibility: that fits with your line of fertilizers and does not precipitate when mixed.
• Format: from small bottles for balconies to jugs for large rooms.
• Technical support: clear cultivation charts and expert attention to adjust doses to your strain.

Common mistakes when using PK 13-14 (and how to avoid them)

1. Over-fertilization: raising the EC abruptly. Solution: gradual increases and observation of leaf tips.
2. P/K overlap: mixing several strong boosters at once. Solution: alternate or reduce total doses.
3. pH out of range: blocks absorption. Solution: calibrate the meter and adjust after mixing everything.
4. No final flushing: reduces organoleptic quality. Solution: lower EC or use water/enzymes in the last waterings.

FAQ: frequently asked questions about PK 13-14

Frequently asked questions

When is PK 13-14 applied?

Generally in the mid-to-late flowering stage, when the buds are formed and swelling begins. In coco/hydro you can slightly advance it and maintain for 2–3 weeks with progressive doses.

Can I use PK 13-14 with organics?

Yes, you can combine it with organic bases if you control the total EC. Avoid mixing it with other high P/K boosters on the same day.

Does it raise the EC a lot?

It is a concentrated supplement, so it is advisable to start low and measure. Adjust the rest of the fertilizers to not exceed the target for your strain and environment.

Do I need root flushing at the end?

Recommended: reduce EC or water with water/enzymes in the last days to promote clean flavors.

Is it suitable for all plants?

It is useful in species and strains that respond to P/K boosts during flowering. Adjust doses to genetics, substrate, and climate.

Conclusion

The well-planned PK 13-14 is a reliable shortcut to denser, resinous, and heavier flowers. Integrate this phosphorus and potassium supplement with a measured watering plan, controlled pH/EC, and a good environment, and you will see how bud swelling takes off without compromising the health of the crop. At Pevgrow, you have proven formulas, competitive prices, and everything you need—from substrates to pH/EC meters—to ensure your harvest reaches its maximum potential.