That is kinda a broad and general question.....some of the favorites for foliar are;
Dyna-Gro Protek plus Dyna-Gro Neem oil -- Can be used in Veg and Bloom up to week 2 or 3 of flower. This is a all round GREAT foliar to use in veg and up to 2 week in flower and for sure a all time favorite! It works fantastically and the Protek silica makes a most excellent emulsifier as opposed to using something like soap...YUCK!! I'll take the protek over some soap any day! It even acts as a leaf shine and protective layer as well as a great prevention for bugs and insects.....the silica improves plant health and growth as well of course.
True Blooms from Primordial Solutions, these are the same folks and company that makes SeaGreen which can also be used as a foliar by itself or a additive to nutrient solutions and is hands down one of the best additives PERIOD!! Can be used in Veg and up to 2nd week of flower.
Snow Storm Ultra Plus Protek for veg and flower to week 4 or 5.
Nitrozyme plus some RO water kicks ass!!
Magic Green from House & Garden is a really good one.
The list goes on and on.....but those are some favorites for sure!!
Then of course you can brew teas (ACT) and foliar spray weekly veg and flower to week 2.
There are many great recipee's for great tea brews.....Check out Capulator's packs, those products can be used for foliar as well and work great......
NOTE: If you try and get products that have more than just a foliar application; like some of the ones listed above it makes them more cost effective IMO. Like the Protek for example makes a great emulsifier instead of using soap for example but it also has many other uses as an additive. Most all products listed above have multiple uses and applications besides foliar except for True Blooms and Magic Green, they are both foliar only products.....
