Early Organic Soil Grow - First Feeding - EWC/Guano Or Use Fox Farm?

Thread starter #1
Hi folks,

Growing in Soil, Roots Organic soil & coco mix currently 5 days since sprouting. 9 seedlings in solo cups.
Under T5s and plan to pot up to 1-gal in another 9-16 days.
Already gave first drink of water on day 3. Second set of leaves showing.
No nutes, only water and a little SuperThrive so far.

Next water I'm planning to:

- Feed with Bu's Brew Compost Tea
- Top dress with Dr. Earth Kelp Meal

Now, my question:

Is this overkill? Or should I start 1/4 (or 1/2) strength FF liquid nutes (Grow Big & Big Bloom) as per their instructions.

OR

Get EWC and Mexican Bat Guano instead and add the Kelp Meal (which will almost be the same as FF bottles).

All other photos/info in my signature. Appreciate the feedback! Thanks!