Rockwool Question??????

Mine took about 2 weeks.

 

[SIZE=10pt]Nutrient Solution PPM per Stage (Suggested) [/SIZE]

[SIZE=10pt]Indica's
Seedlings and clones 300-400ppm 5.3-5.5 ph  
early vegg 500-600ppm 5.3-5.6 ph                 [/SIZE]
middle vegg 600-800ppm 5.4-5.6 ph           
late vegg 800-1000ppm 5.5-5.7 ph                  
[SIZE=10pt]early flower 1000-1300ppm 5.5-5.7 ph           
middle flower 1400-1600ppm 5.5-5.8 ph          
late flower 1000-1100ppm 5.5-5.7 ph               [/SIZE]
ripening 300-500ppm 5.4-5.6 ph                      

sativa's
seedlings and clones 250-350ppm 5.3-5.5 ph
early vegg 300-500ppm 5.3-5.6 ph
middle vegg 500-700ppm 5.4-5.6 ph
late vegg 700-900ppm 5.5-5.7 ph
early flower 1000-1100ppm 5.5-5.7 ph
middle flower 1100-1300ppm 5.5-5.8 ph
late flower 800-1000ppm 5.5-5.7 ph
ripening 300-500ppm 5.4-5.6 ph

 

I've only germ'd one seed in rockwool, but the tap root popped out of the bottom on day 5 from the time I put it in. This was in a 1.5 inch cube, by the way.

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Useful post! Thanks, mykee

 

It depends on how deep your rockwool is, but usually only a few days, roots grow really fast.
 
You should not use nutrients until the cotyledons start to turn yellow.  At that point, I would suggest feeding a seedling with only about 200 PPM solution for a few days to get started.  Once it starts growing nicely, ramp that up by 100-200PPM per day up to about 1200PPM at the most (for a beginner, I wouldn't recommend going beyond that for now)  But your plant will do just fine at 600-700.

 

I would say yes. I've grown autos using a scale pretty much the same as this. You have to be a little more careful with autos, though, they tend to be more sensitive to nutes.

 

Depends really I've had then sprout only 4-5 days after putting it in rockwool


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If the conditions are good a seedling will grow its roots by a couple of inches per day.  But unfortunately getting good conditions in rockwool is not easy

 

i popped 2 seeds recently, 1 i popped in a paper towel and then put in the 1.5 inch cube when the taproot was about 5mm long, took 3 days to break out of the cube, second i popped right in the cube and the taproot came out 4 days later 

 

I think maybe if the pH is right in the rockwool, it should pop out after just a few days with the root coming not long after. Like I said, mine was after 5 days. I soaked the rockwool cube in pH 5.5 water overnight and put the seed in the next day. But ok, I guess temperature also plays a role in how long it takes.