Have a look here mate, a
tutorial on low trauma transplanting,... the key is to use larger cup sizes and something you can easily cut through....
Generally, follow the label directions as different brands may be different in how they process it,.. For sure, use a wetting agent! Neem is oily goopy stuff, first press stuff is loaded with other goods plants like besides it's bug killing power, but high residue (not for bloom!) and stank is the price...Wetting agents work like soap, emulsifying the soln. much better! it also helps coat and stick much better, otherwise stuff just beads up = poor absorption; liquid state is how it gets in, once dry it's "marooned" until redissolved again.
I don't use neem oil much myself, certainly not often... For pests, there are better things if that's the main reason you are foliar spraying.
:smoking: don't get set on that mate, foliar sprays are excellent if done properly, with the right products... In the horticultural industry this is a common feed/supplemental way to boost the plants along. I foliar more or less weekly, with fulvic acid, Si, maybe micronutes or kelp....whatever looks good for them at the time!
As mentioned above, a wetting agent is key, also spray the UNDERSIDES of the leaves well, far more stomata there for uptake,...
*** Fulvic is pure magic even by itself, but it also chelated nutrients, serves as a carbon source for both plants and microbes in and out of the soil... Humic is a much larger molecule, can't be taken in directly like fulvic, but humic serves better in the soil for several reasons,.. There's a great article on himic-fulvic and chelation in the Reference section,.. read up, it's solid good info!
Sources: BioAg makes excellent stuff. Ful-Humic is a powdered version, very good value for the $, my 100g bag was cheap and has lasted years now, very concentrated in this form. They make Ful-Power, a liquid fulvic that's great too, but a better value tip came from brother Growshi -->
Soluble Fulvic Acid, one pound Ferti-Organic Soluble Fulvic Acid, one pound container - $13.40
Ferti-Organic Soluble Fulvic Acid powder, 69% fulvic acid concentrate, hydroponic, foliar fertilizer.
customhydronutrients.com
-- this is a shitload of fulvic! Shipping costs as much as the product, but doesn't change the value a bit... Ful-Power is 20+$/qt, and dilute, whereas this powder is also very conc., with like 1/4tsp/gal (I think, forgetting here),..more is OK, you can't really hurt plants with fulvic barring stoopid overdosing amounts!