PK Spike is formulated to provide a uniform quantity of phosphorus and potassium to your flowering plants. Designed with over 25% more P/K than the next industry leading brand, this product can be applied at a maximum rate of 1mL/L to achieve a 250ppm P/K spike to your plants.
Use: Begin use in week 2 of flowering cycle.
Dual Fuel Professional Feeding ProgramGP3 Professional Feeding Program
Title
1 L, 5L, 20 L
Recently Viewed
Fancy Exclusive Offers & Top Advice?
Occasional emails. No spam, honest.
Melbourne's leading
hydroponic store
Doing it the A-Grade Way since 2013.
100% Product Testing
"If we don't use it, we don't stock it." We test everything we sell.
Personalised technical and customer support
A-Grade customers receive horticultural support from seed to harvest.
Easy ordering to suit your style
Buy online or in store. Give us a call. We are always happy to help.