The math behind drybacks, optimizing EC at the end of flower, Office Hours is headed to MJBizCon, & More!

Jason and Kaisha (in person!) were fired up in this week’s session – and not only because our community came through looking for insights on going vegetative for an entire run, how to calculate drybacks, measuring canopy height, & more fire cultivation topics! They also dropped the news that Office Hours will be broadcasting live from the exhibit hall floor during MJBizCon next month.

Claim your spot, then check out some of the top quotes from last week’s show:

Going All Vegetative?

“What would we expect if we're running Vegetative the entire run? Typically, what is going to happen is we're going to have larger node spacing, maybe not quite as much nodes. Flower development is going to typically start later in the plant cycle, and so we may have to run a longer cycle in order to actually get to ideal ripeness of the plant.”

– Jason

Dryback Math Refresher

“When we're talking about a 20% dryback, we're talking about not 20% of the field capacity, but 20% of the volumetric water content…If we had one gallon of water and a one-gallon substrate, we'd be at 100%....That coco takes up some space, we'll see field capacity at, say, 60%. Well, if we see a 20% dryback, now we're at 40% water content in that substrate.”

– Jason

Getting to the Root of EC 

“When we're talking about ECs, we always need to specify what EC that we're measuring. So our input ECs are always going to be how much nutrients are we mixing into the fertigation substrate. ECs measured with some type of electronic measurement, like capacitance with the TEROS 12 that we're all so familiar with in the AROYA system, and then there's also runoff EC as well. For the most part, we're always controlling EC with the feed EC and how we are irrigating.”

–Jason