HubbaBubbaHaze. Pineapple Express Auto, Banana Kush Cake Auto

This is my first grow. Wish me luck! All seeds were soaked in water for 24 hours and stored in a dark place. After ~10 hours I gave each seed a little push with my fingertip and they sank the the bottom. They were then planted directly in soil at a depth of ~0.5cm and broke through the soil after 3 days. My pots are 12 liters filled with mostly BioBizz Allmix and about 1.5 liters LightMix on top. My plan is to not feed them for the first 3-4 weeks, because the prefertilized soil might burn the plant if I add additional fertilizer. The lights are on 40% and 80cm above the sproutlings. I picked those strains because I wanted to have a strain of each type: HBH Is described as an uplifting sativa. PA sounds like a sativa leaning hybrid and the effect of BKC is described as very relaxing. I am a little afraid that my space (0.5m²) might be a bit too small for those 3 plants. While HBHs and PAs official description list them as being around 100 cm tall, I have read a few reports stating that the plants grew way larger, up to 130-140 cm. I have ~150 cm from pot to light and maybe 160 cm if I rearrange my setup. The tent is 92x54x189 cm, so it might get crowded. It is designed to fit in an IKEA Wardrobe, which I have ordered but not received yet.