After Germinating

I germinate in Root Riot plugs they can be transfered to soil or hydroponics plus the pretreatment of mycorrhizae and other micro life gives the roots a little boost at sprout

Hey there! I personally soaked my seed in a solution of Humic and Fulvic Acids in distilled water until it sunk, then as soon as it sank it went straight into a peat plug in the dark above the radiator kept at 23-25 degrees, keep the plug moist but not wet took about 3 days for the seedling to break ground in the peat plug then once the tap root had begun to escape from the peat plug I planted straight into the soil and began watering from there HTH

Personally, I tried both and prefer to plant the seed immediatly in it's final pot.

Agree 600w is too much , check to see if you ballast can be toned down to 400w and get new bulbs. You'll never hear me recomend LEDs as will have way better success with your HID in a side by side. Temp will be only issue with HID. I personally don't like messing around with transplants as can stun/stress your plant. I throw my seeds in a cup of water until they crack. I put in a starter cube, puck, soil tray, ect. and wait until they pop up. Once shed the shell I replant into the container will grow full cycle in.

Hi! You should plant it in a smaller pot first unless autoflower. This prevents the plant to focus too much on root growth and transplant when she's grown bigger. What comes to the number of plants, it depends on your setup. You can fit four plants in that tent if you train them but two girls should be good. Yieldwise the number of plants is not that big factor 'cos you can always veg longer to make bigger plants or less time with more plants, what matters is the power draw of your light. If you have true 600W lamp it is too much for that tent but with modern leds 1g/w is easily achieved and over 2g/w is possible