looks like we are grow partners. i just planted 5 plants about the same time you did and im having the same kind of slow growth ( i think its over watering, as i planted straight into 1 gal smart pots).
- im under a 1k watt MH right now with temps at 82 and RH at 35%. so your lighting as long as its not burning the plants and bleaching them out should be fine. the only thing your wasting is money on the extra wattage but for me your 600 watt would only be like 7 cents an hour to run so thats meh..
_Phing the water will not hurt the plant what so ever and as my natural ph comes out my tap at a whopping 7.5 i always ph down to 6.5 as this alows the most uptake of almost all nutrients ( at least my research shows this)
- The humidity may be a problem as ive read and researched that keeping at least above 30% is like minimum and at the seedling stage its advantageous to achieve 50% ( especially with high wattage lights) because basically the plants roots have not developed enough to uptake the water required to cool them selves in that kind of radiant heat. with the 50 percent humidity the leaves can actually pull water from the air to help along the plant until roots have developed.
- temp is perfect in my opinion
the co2 thing is the last thing you need to think about if you are not growing in a sealed environment.
other than the concern for size ( which previously stated maybe due to under watering) i would say your plants look happy and healthy.
good luck with the op ill be checking in to see how you and the babies are doing. ( also im a first time grower so if for some reason im spouting off at the mouth and an experienced grower contradicts my statements then fair play. The information ive given is to the best of my knowledge)
Aw that's awesome! We can update each other on our grows! Do you know what strain you planted? And when? I think mine had to do with under watering. My lights go off at 1:20 and I woke up late after a night of drinking so I couldn't check on them.
-how big is your grow space? I had a hard time maintaining temps at 600 >.<
-yeah I bought distilled water and it comes out around 7.
-yeah I've read that humidity probably plays a part with the slow grow. I'm getting a humidifier in tomorrow so hopefully that helps. Also the thin leaves may be an indication as well.
-yeah temp I finally got under control
The only reason why I worry about co2 is because I grow in the basement and since it's still a bit chilly, we keep the window closed. And not a lot of people spend time down there. My ventilation also doesn't draw air from the outside so that's why I was assuming co2 was a problem. Already bought the yeast so it won't hurt, right? Good luck to you too! Do you have an email you wanna exchange progress on? I think it'd be fun
I'd like to see some pictures of your grow as well.
