I didn't use any supplements during veg. Here is the U.S., it's impossible to find potting soil made specifically for cannabis. For us, trying to make our own mixture was out of the question. We planted in a premix called Baccto Lite. Between the soil mix and watering with natural spring water, our pH levels have been a consistent 6.5.
I bought some Kushy Kush to use during bloom cycle but have not used it yet. Is it okay to use even if we do not have kush plants. Will it be okay to use on our white widow and haze seeds once we get them to bloom stage? If not, what would you recommend.
There are actually a few places that sell soils specifically for cannabis. Build a soil and Kind soil are a couple right off the top of my head. I consider all of the Fox Farms soil mixes, more or less, designed for cannabis. Hell, even home depot sells Black Magic (evil corporate soil). I'm currently running Fox Farms Coco Loco with Kind Soil. It's my first time with a "soil" mix and I'm loving it so far.
I don't know much about the Baccto Lite but I read this and immediately was concerned... "BACCTO LITEâ„¢ Premium Potting Soil includes starter and slow-release fertilizers" Sounds a lot like a Miracle Gro type soil. It doesn't mention that it's organic so I'm assuming it's a salt based nutrient. Slow release means you may burn your plants if you add any nutrients. Which slow release nutrients they put in there will definitely effect how you should move forward. I wouldn't recommend using any nutrients until you see deficiencies. Luckily, you're in the right place as Nebula has you covered.
I'm familiar with Kushy Kush. It's made by advanced nutrients, specifically designed for kush strains. I'm not sure of the how or why it's good for them but I personally wouldn't run this on non-kush plants. I'm sure it would be fine, but not optimal. If you want a bloom booster, try big bud. I had great results with that in hydro. You can run it the whole flowering period too instead of using their other boosters which are designed for different phases of bloom. There's plenty of other bloom enhancers out there, but some contain artificial PGR's (Plant Growth Regulator) which are known to be a carcinogen. Kelp is a natural PGR so if you're going organic...
I also like AN's Bud Candy (carbohydrate supplement). As soon as I add it, I've noticed a sweeter aroma from the girls and the end product has this as well. It also feeds beneficials in your media and keeps them happy.
According to my uncle, all you need is a seed, a medium, and a base nutrient. Anything more is bells and whistles. He's been doing it for 15 years and he can grow some fire.