This is my first grow and I have the following set up:

DR60 24"x24"x55"
x2 T5 24" 2 bulb (one cool and warm bulb in each)
temp: 76-80 degrees
rockwool cubes sit in a propogation tray, no dome

The seedlings without a toothpick are ~10 days old and the seedlings with a toothpick are 1 and 4 days old.

I noticed that the roots coming out of the bottom of one of my rockwool cubes are brown at the tip of the root. Is this because the rockwool cubes are too wet or because there is not enough air getting to the roots? Any advice?

I read through Al B Fucts threads for answers and got great info there but nothing about brown root tips.

I began these plants from some bag seed. I germinated in a mug of distilled water covered with a saucer. Once the seeds cracked and root tip emerged, I placed into 1" rockwool cubes. I prepared my rockwool with a solution of 4 liters of tap water and 6 ml of Thrive Alive Red. I used a 1/2 strength solution as aposed to the recommended full strength. I followed up by adjusting PH to 5.5-5.6. I dropped my RW cubes in and let them sink to the bottom. I then pulled them out and squeezed out a portion of the water in each of the cubes and placed my seeds in them. The cubes then went into a dark warm place until signs of life appeared. At that point i introduced them to light, 20/4. The seedlings eventually showed roots poking out the bottoms of the 1" cubes, so i transferred them to 4" cubes. I prepared the 4" cubes the same way I did the 1" cubes. All seems to be going great except for the brown root tips on one of my seedlings. the leaves on this seedling also seem to be drooping. This is concerning me because I had a seedling just fall over and die about 8 hours after I noticed a brown root tip on it. That seedling was about 4 days old. When I feel that the RW cubes are dry I have been spraying them with the half strength solution that I used to soak my RW cubes in. I only spray the RW until it feels damp. Should I only be using ph adjusted tap water at this point? How often should I water my cubes? I will post more pics in the days to come.

Attached Images

	seedlings.jpg (673.4 KB, 5 views)
	brown root tips.jpg (471.5 KB, 1 views)
	brown root tips2.jpg (555.3 KB, 3 views)

Its been about a week since my last post. my plants are looking good except for one. there are brown spots on the leaves of one plant. since my last post i have been watering them for 2 minutes, 3 times a day, on a drip system. the drippers are 2gal/per. prior to having my plants on the drip system, i was watering them by hand, soaking the bottom half of the 4" cubes in ph adjsuted water of 5.5-5.8 for 1-2 seconds.

i have been using the technaflora recipe for success.
http://www.technaflora.com/sharedfiles/USA3RFS2008.pdf
this was a starter kit of nutrients for around $30

so far, i have only used the nutrients described in the cutting stage and the seedling and transplanting stage. I am currently using a 1/2 strength solution of Root 66 and Sugar Daddy in my drip system, 2mins, 3x a day.

Am i still over watering? Is this nutirent burn? ph lockout? i need some advice please. i first noticed this when black spots started showing up on the leaves about a week ago. those spots have now turned into the brown spots.

Can someone tell me what the problem is? How do i correct this?

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	group shot.jpg (596.3 KB, 1 views)
	brownspots.jpg (599.1 KB, 3 views)
	brownspots2.jpg (583.8 KB, 1 views)
	brownspots3.jpg (601.2 KB, 2 views)

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http://www.rollitup.org/grow-journal...w-bagseed.html

just wanted to show a more detailed close up of the sick plant.

Attached Images

brownspotstop.jpg (864.3 KB, 4 views)

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