Newbie first time doing Bubbleponic DWC grow

flogger

Active Member
Hey RIU.

I postedthis in the Hydroponic/DWC section lastnight but didn't get much feedback. Although what I did get was helpful.

Wanted to see if my seedling is at the size it should be for 2 weeks.

Thought I'd try a DWC grow from seed using the Roseman Bubbleponic DWC design. I like the design but I don't think I am seeing the fast growth I expected and read about by growing using this Bubbleponic DWC system.
Here is what I have.
2 fem PPP seedling. Germinated and tap root showed on 8/2, so planted in rockwool on 8/2 and placed in this system (home made). The seed broke through and showed its inital leaves on 8/4. This pict if from today (8/17). So approx 13 days since it broke ground.
Some info:
- PH has been between 5.8 and 6.5, having to lower it a little everyday cause it keeps going up.
- Room air temp is approx 79deg F.
- Reservoir temp about the same, maybe a little lower when I put in frozen plastic water bottles.
- 4, 4ft long, 54W T5 6500K lights. Kind of overkill since only a portion of the light is hitting the little seedling. Wold it help if I added a 2700k CFL to help with growth (isn't that what a HPS is like)
- My PPM's are hovering around 190ppm's. I am using only tap water. NO NUTES. So that I think is strange why it is 190ppm's.
- I run the feeder tubes for 30 min ON, then 3 hours OFF, since the rockwool gets really wet.
Does this seedling look OK? I ask that because I have looked at some posts on here and some guys have these picts from seed and the seedlings are like 15 times the size of my seedling, about 2 weeks in.
They say things like, "Yeah, just planted this from seed 5 days ago, and it's growing like crazy". Then they post a pict of this tree!
So either they are mega skilled at growing fast seedlings, or are just lying. OR they just know what they are doing and I am stupid/unlucky/...
So can any of you Bubbleponic DWC'ers and other experienced hydro growers let me know if my seedling is where it should be 13 days into a grow?
This is a pict of just one seedling. One of the Cotyledon is turning brown. The light is close but maybe too close. Also on one the one main leave is twisting.

Thanks! Any help would be great guys.
 

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Ya that does seem a bit small for two weeks, maybe try giving it half strength nutes. Also what are your genetics cuz you could just have a dud, some shrimpy plant that might grow really slow. And the high ppm is probably due to calcium in the tap water. Start it on a low dose nutes, good luck.
 
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