Seamaiden,
good mornin to ya, and thanks for stoppin by the fun lab. Can I get you a cappuccino?:)
Snowcrash,
thanks for stopping by and offering input.
I share the same theory as you in the leaf curl being a transpiration issue.
As far as the RH, my daytime isn't actually up to what's recommended in the article on VPD in max yield mag. Whether they are right or not is to be seen. They do seem reputable enough of a source. It just seems odd also that every green house that I have ever been in seems like 80% RH at least. I do have a lot of air moving around as well also to be safer. We shall see if it works or bites me in the ass in the long run. So far no signs of PM or bud rot anywhere. The extra Potassium could be definitely also be something. I have been trying to stick as close to the whole Canna program on this run, so I am not sure if I want to vary too much this run, just for future runs comparisons sake. The curl is not on some plants, minor on others, worse on a few. I always had attributed it to hot spots, which also result in pockets of low RH. My temp probe in the hotter areas had also confirmed the statistics. Up to 10 degrees warmer, and 10-15% lower RH. It seems to be a byproduct of the adjust-a-wing reflectors.
-TF:evilgrin0013:
Totally dude. I don't want to seem like a "no" it all. There is definitely some credence to higher humidity in greenhouses. Time will tell...
With the leaf curl I get that pretty commonly when using Canna. My Skunk and Trainwreck strains that are like perfectly balanced 50/50 sativa-indica always seem to be on the hunt for a little more K+ then I give them. I've tried a few things,
Humboldt Nutrients Deuce Deuce was pretty good for the transitional stage because at 0-0-22 you don't need more that a drop in a large reservoir to adjust the level enough. The kelp extracts helped keep stretch under control on those 50/50 strains that seem to have a bit more vigor in them from seed than the others that lean on way or another. The problem with this product is that it has too short a shelf life for someone not burning through a commercial amount of gallons of solution.
Recently I've switched over to AN
Big Bud dry (because it has more Potassium than the mixed stuff) and this has had a good influence on the flower building period, around days 20 to 38 of flowering, before the big PK push around weeks 5 and 6. I'll keep my use low, watching the EC as I add it. I'll add maybe .05ec at first, working up slowly to about 0.2ec (or about 100ppm) extra. Not a huge amount, but enough to combat that curl and it doesn't hurt to get some nice big buds too. Of all the AN products the
Big Bud Dry is really reasonably priced, especially when you're not using much in each reservoir. The $20 smaller jar lasted me like 25 plants in ~10L of coco on average start to finish.
Food for thought.
I'm learning a lot from this thread. I really, REALLY, appreciate journals that I can learn something from. Thanks a lot for all the great input and detail into your methods.
