Emerald Harvest - King KolaHow King Kola Works King Kola is a PK booster that delivers exceptional results right the way through the bloom phase. All you need to do is adjust the dosage accordingly, starting low early on, and increasing it as you progress through to harvest. Just make sure that you reduce the dosage in the second to last week of flower and stop altogether during the final week of flushing. You can start using it as soon as you flip your lights to a 12 12