There is no secret additive thats going to give you more teichrome production if thats where your at 5 weeks into flower. The only thing thats going to improve your current situation is going to be more light (much more), good soil, and a proper environment. Honestly, I would save up a little, get a decent light, some good soil, pick up a bottle of dynagro foliage pro, get your environmentals set and start over. Even a cheap little mars hydro or viraspectra led will get you lightyears ahead of of where your at now. I know people talk shit about them, but you can pull some pretty solid buds off a little 1-2 plant grow with one of those. Also, order some decent seeds... good genetics are a very good investment. You can't expect good trich coverage from genes that just wont allow it.
Ill bet you anything your current area is not light proof so your getting inconsistant light/dark periods which is causing sporadic flowering. You look like your maybe a week into flowering. Also, veg your plant long enough to get it to at least 15" tall if your hoping to harvest anything worth your while... should veg at least 3-4 weeks. That plant look like it was maybe vegged for a week then stopped growing.
Good luck!
Environment, grower, genetics.
Actually, if you would take the time to research what affect sulfur has on plants, you'd see it is anything but a fad. The nutrient companies, when they bottle it up in liquid form, are sellin bs snake oil.
This, and UV supplementation, can increase tric's and their resin content.
As far as genetics, bagseed brought us chemdog. Don't buy into the flavor of the day pollen chuck, look for guys that seem to understand genetics, and if you're going to pay more than $75, make sure it's not an F1, get a worked line. Stable.
Some idiots pay 250 a pack for a fad lol
Grab a good NL cross and work thst shit.
You'll know if you're doing it right...