If your doing soil, I wouldn't feed until 2-4 weeks after transplant. The soil already contains the nutrients it needs for the next 2-4 weeks.
Depends on the soil used! Some can be pretty weak to actually neutral!
Once in Solo's, that first watering is a weak feed with kelp extract.....The use of kelp can make roots grow to as much as 173% larger/faster then "normal".....
I transplant about now,
The growth is all good and they drink that cup dry every day.
Pain in the ass so its time
Just about the same for me Char!
I have to have the roots coiling "for me" and my CDO....(That's OCD in proper alphabetical order). I then take a knife and cut the bottom of those roots in an X pattern for explosive root growth in the next pot. This is an old school greenhouse method of transplanting or "up-potting"...
You all should note that you can leave any plant, in any container, as long as you want....... You just have to adjust the feed properly
and water/feed it as it requires.... I still play with some plants in 2 gallon pots and they are 5-6 ft tall......Use synthetic and see what the plant requires feed wise to run in that limited root space.....Oh, yields average right
around 1.25 zips per gallon. Now running that same size plant in a 5 gallon.....Yields are 2 zips per gallon.. Some strains more, some less...
Last night I experimented with some rooting powder on a transplant. Wanna see how that goes (reveg actually)
You used a chemical that makes the plant produce a hormone that makes the area treated, root. Not gunna do much if anything!
Use some Kelp meal in your soil or use kelp extract in feed solutions at transplant.