What is the NPK of the fert your using? 1 tblspn per gal is pretty light. If you look up clackamasses recipe linked below he uses a lot more than your ratio on multiple fertilizers. I'm guessing you'd run out of gas pretty quick on your soil. He also uses teas and top dresses so your comparing apple's to apple's. Also what is the your desired plant size in terms of space or height? The size of your plant will dictate soil strength and pot size.
There's a ton of reasons to consider Vegan amendments for your soil and fertilizer needs. For some, it's a life choice based on the food they put in their body, for others it may be a desire to not support the current meat industry and slaughterhouses. That's definitely something I can get...
www.kisorganics.com
The NPK is 7-2-3 but the soil I'm using is also amended. I'm using a 50/50 mixture of the following:
Base Camp – Potting Soil
Base Camp contains: coco coir, sphagnum peat moss, perlite, pumice, aged forest humus, earthworm castings, bat guano, seabird guano, alfalfa, seaweed, fish meal, fish bone, crab meal, oyster shell, neem seed meal, soft rock phosphate, langbeinite, glacial rock dust, volcanic ash, yucca and mycorrhizae
Nectar for the Gods Blend #4
Nectar’s most popular blend. A general potting mix designed for indoor and outdoor use. Suitable for multiple feedings per week. Mixed in small batches. Contains no bark or fillers. Coir fiber is rinsed on-site with Oregon rainwater and buffered with limestone to reduce salts. After blending and bagging, soil sits unwrapped and covered for up to 30 days to activate, compost and then go dormant, to avoid HOT soil. Ingredients: Sphagnum peat moss, perlite, coir fiber, pumice, mycorrhizal fungi, yucca meal, kelp meal, bone meal, diatomaceous earth, clay, basalt, oyster shell (for pH adjustment), humus and lime (for pH adjustment).