I emailed CANNA asking them about the application of PK13/14. My current bottle states that the product should be applied ONLY ONCE at THREE weeks before harvest. I asked the rep what stage in the plants life is this "three weeks before harvest" referring to.
I want to know during which of the following stages is the product supposed to be applied:
1. the stretching phase
2. after the stretching phase
3. when flowers (buds) first form
4. when flowers are mostly formed and begin to increase in size
5. when flower size is set and resin production increases
This was the reps response:
"...To begin, there is no such statement on the current label for PK 13/14. The older labels said 5 weeks before harvest which was designed for 8 week flowering crops but removed more than 3 years ago since it caused great confusion with 6, 10, and 12 or more week crops.
I do not know what a stretching period is so here is the best way to use it. First time users should start about 5 - 10 days after the change of photoperiod, about when the first signs of flowers appear, also known as flower induction. Use it for at least 3 weeks. The next several crops, adjust to fit including delaying first application and decreasing the amount of time it is applied. Ultimately you will achieve about a 7 - 12 day window of optimum usage. Longer term crops may require longer app periods (12 days) where as shorter crop response needs less (7 day)It will also save you some money."
I am currently growing two clones of headband that have just begun the second week of flowering. Buds are starting to form. I guess now would be the time to apply the pk13/14. I have a little bit left over pk13/14 from previous grows. After its all tapped out this time around, I'm moving on to ATAMI's BLOOMBASTIC.
Edited by jus_chillin, 12 November 2010 - 08:43 AM.