copperfacedave
Active member
Would a 6 gallon coco hempy bucket be big enough for 2lb trees? or would you go bigger?
Hempy buckets are a poor choice for trees.
Hempy buckets rely on the right ratio of water to air in the pot, meaning you can't really play around much with drain hole height before you start getting root rot. 2 lb trees are damn near impossible indoors, but I've grown 1 lb ones indoors and they needed a much longer veg than you're thinking and they drank something like 5 gallons a day if I remember right. 5 gallon hempy buckets hold less than a gallon in the res, for comparison.
I've also never heard of using coco in hempy. I use Perlite. I imagine coco would hold a lot more water which is not at all a good thing in hempy. Again, the whole point of that passive res system is to hold a balanced ratio of water to air.
Active hydroponics is going to get you theoretically closest to what you want, but I think you may have some unreasonable expectations about what these plants can do. What you're asking IS technically possible for someone like Heath Robinson, but he's about it. I believe he has a journal floating around somewhere about his black rose and critical mass tree experiments with an undercurrent system. Might want to look into that if you're set on hydroponics and large trees.
Hempy's even with a reservoir at the bottom with hydroton, lava rocks, or anything else is still a passive hydroponic system. It is technically shallow water culture with a large inert soiless media above. When you begin to recirulate this solution you now have a dutch bucket system which is an active hydroponic system (depending on your active/passive definitions).
As I stated above, I have a blackberry bush in a 5 gal coco hempy and there is no additional work involved other than watering once per day with the same feed as I do my coco pots. It is still DTW hydro. Nothing like DWC or RDWC, and even the dutch buckets do not compare to the work involved. The benefit of a hempy is the increased time between watering, while maintaining the ease of DTW. With a long season crop like a blackberry, I decided that extra res would, in turn, give me a larger plant while only needing daily watering vs a straight pot. The same is true of MJ indoors, however trying to make that work with such a limited veg time I believe is counter intuitive and a drip system makes much more sense.
Increased time between watering is not something I want if growing trees. Just automate, recirculate your solution, keep on top of EC and PH. Coco or perlite will both work just fine. I would probably use something in the neighborhood of 18 gallons of media. Why not? I too think 2 months veg is a bit short, three would be better.