Icy Grape F4
This journal will cover the cultivation, evaluation, and selective pollination of the F4 generation of my IGF3No.1_11 line breeding with the goal of creating an improved F5.
I’m going to germinate 45 seeds of IGF4No.11 stock using my sterile paper-towel method, and then grow the seedlings inside a sterile high dome humidity tray. Initially the seeds will go into root plugs.
From first true leaves on plants will be in 70/30 coir/perlite with fertigation solution based on Jack’s 321, Si, & H2O2. Initial EC will be 400 (combined), but I will increase by 100 microsiemens per week until I reach 1000, and at that point I’ll step up 200 microsiemens per week until I’m satisfied that I’m overdoing it. From there I’ll back off.
The mother of all these seeds was vigorous, mold resistant, early to mature, produced a very dark anthocyanin level in the flower without cold or wide dif, and carried fruit candy flavors through to cure. I tried to revegetate the mother plant, but failed.
The father was a vigorous, resinous plant, with gynodioecious traits.
Further decisions will be based on observations and comparisons to prior work. To the extent it’s possible, I will preserve clones of plants.
Seedlings will be under an HLG 65 4k at 40”. For vegetative growth my 36”x36” vegetative tent will do. I have both an HLG 100 V2 4k and a 3k light in there now.
The flowering tent is lit by an HLG 600 R-Spec. I have a 27 gallon tote for a reservoir. I’ll use a self-draining tray setup and I’ve got various watering halos and drip heads.
- Identify a female equal to or better than their mother
- Identify a desirable gynodioecious pollen donor
- Produce F5 seeds (regular and gynoecious)
Seedlings are doing okay, not great. That is to say they’re not growing with the vigor a polyhybrid or F1 hybrid would typically display. Or am I just really bad at this phase of cultivation? Worth assessing, because I’m having a lot of issues getting from cotyledon to vigorous vegetative growth lately. Maybe I’m overwatering, or some other environmental condition is suboptimal.
I mixed up a new batch of solution. 2.95g of Jack’s Clone, and 5ml pH down in about 3 gallons of water. Results were 800 microsiemens at 6.1 pH. I used that to top off the previous batch, and the final EC was 700.