When to move rockwool seedlings to dutch buckets

[gdgdad]

Hey Stan, hope this update finds you well. I see the weather’s still a little chilly up there. Today we picked our first tomatoes for 2020!! 5 total, the largest 32.7 oz., smallest 17.8 oz., total of 7.2 lbs. for all of them. VERY JUICY! DELICIOUS!! - however, the tomatoes we picked have very pronounced cracking, newer ones (still green) seem to have less cracking. Everything I’ve read says it’s a water issue (too much??). Here’s where I’m at on timer settings, nutrients, weather, etc…..

- Timer ON 4 min 30 seconds (verified via stop watch on phone). Timer is OFF for 10 minutes.
- Nutrients being run at ~ 50%, with Epsom Salt added @ 1 gram per gallon.
- Since November 1st. 2019, when all 5 plants placed in Dutch Buckets, plants have consumed 117 gallons.
- Temps (lately) have been in the low 80’s, humidity fairly low. During “cold spells”, I was able to maintain temp inside greenhouse at ~ 45F minimum (typically over 50F).
- Plants are easily 8 ft. or taller, new blooming (flowering) going on still, tomatoes from 1” to the 2lb. size.

I finished “repairing” the aeroponic system, all leaks repaired, sprayers verified operational, just need to put in-ground reservoir. The new seedlings, as usual, not going well. I’ve only had 5 sprout out of 21 in rockwool cubes. Restarted more and made a point to log the “days to germinate” for each type. These are in the typical seed starter tray with dome, kept in the garage which stays warm and has indirect light during day hours.

So…… any advice / direction appreciated. I’ve added pics and if you need to see something specific, let me know and I’ll take a pic. Thanks so much!