I've never found rooting aid necessary because Ficus comes so easy.
Sep 21, Cut a 4-inch-long piece from the tip of a ficus tree branch. Make the cutting at a degree angle. Remove the leaves from the bottom half of the cutting. Dip the angled end of the cutting into the rooting hormone deep enough so that at least one leaf node is bushdigging.clubg: Fairfield CT. Cut a two- to four-inch tip off a ficus branch, using a sharp, clean knife. Remove the leaves from the lower half of the cutting, to create a bare stem. Dip the cut end in powdered rooting hormone, then slide it into the rooting mix.
Step 5Missing: Fairfield CT. Nov 11, Another method of turning a ficus benjamina cutting into a full-fledged plant is to dip the cutting into a rooting hormone, which you can find in gardening supply stores.
Pour a small amount of Missing: Fairfield CT. For cuttings, air in the root zone is definitely your friend, and think 'damp' not 'wet'.
Install the app.
Tenting your cuttings is also very helpful. {gwi} Keep cuttings in very bright indirect light. Open shade is great. Shoot for soil temps in the low to mids. A Ficus start. I start tons of Ficus cuttings for myself & friends. {gwi} AlMissing: Fairfield CT. In addition to various species of Ficus, many trees in the Salix and Olea genera (just off the top of my head - I'm sure there are more) will also root from fence post size cuttings.
In the link provided, if you still doubt, an acquaintance of mine who lives in Montana describes rooting 4" caliper Ficus cuttings, so it's not much of a stretch Missing: Fairfield CT. May 27, I root Ficus in pure pumice, sometimes adding sand if the cuttings are very thin. I usually reduce the leaf mass, spray with hydrogen peroxide (H2O2)/water mix and cover with a plastic bag or inside a plastic container in mostly shade. Opening it up every few days to remove dead leaves and spray the H2O2 mix as a bushdigging.clubg: Fairfield CT.