As said, Amazonia is rich soil so that would be enough certainly for the first week.. I guess everybody has his own method and experiences with DSM. In my experience growing young plantlets in rich soil (substrate) i wouldn't add any ferts the first week. These first days nothing much will happen, the plants get a transplant shock, the roots need to addapt to the soil and any root damage caused by cutting and sticking in the substrate, since you drasticly switch them from invitro or rockwoll to a rich clay based soil.
Depends on the plantlets some are stronger some are weaker. If every plantlet would be in his own pot, it would be easy to give each the specific care it needs. But with DSM in a tank the whole bunch is in one big pot.
The way i would go around is first week just keeping moist and spray a few times a day with demi-water.. I'm a great fan and have only positive experience with the use of naturaly seaweed based root stimulators which i spray from day one. (Actualy i keep using it regularly next to the ferts.) It contains hormones and vitamins and helps to prevent the transplant shock, benefits root repair and growth and kickstarts bacterial collony in the soil. Even mosses love it and thrive on it. Maybe you'll see some plantlets looking droopy the first days, some come back after a few days others may not and just melt away. If the majority looks healty after 7 to 10 days i would add very little ferts to the spray bottle starting with 1/10 of the recomended dosage, spray it every other day, the days in between spray with demi-water to clean the leaves from residue left from the ferts. Little by little up the dosage to 1/4 of the recomended dosage if you see the plants doing well with this regime.
Putting young plants in rich soils there will always be a great risk of getting burned roots and leaves.. Making it even richer only increases this risk. Young plants don't need much, they need an isotone inveronment so they can easily recover. If the soil already is rich enough, putting more in it and on the plants you disturb this process and the soil starts sucking the plantlets dry (burn), roots die, leaves start to curl and discolor from yellow to necrotic dry brown tips, in moist inveronments, rotting slimey and black (melt). Rich soil already is like salt on it's wounds the first weeks
Then after a few weeks you'll fill up and the transition from emersed to submersed will kick in, shock number 2. They won't do that much again these first days. Always go slow, little by little.. 🙂 Addapt to what they tell you, help them addapt. Rather prevent than cure.. 🙂
