urgent help

[growell]

my seedling are 4inch high and looked great then a couple of days ago the bottom leaves started going yellow thought plant was getting rid of the early leaves then they all started going lime green so ichecked my run off and everything was sky high ph7.5 ppm1600 so i though i would flush them i am in the middle of doing it now my water is ph6.5 i put through 5litres my ppm has come right down to 600ppm but my ph is 7.8 its going up thought pen might be broke so used the solution test were u put drops in water there in 4inch pots soil perlite mix flora grow trio nutes at quarter strenght of bottle guide and 600 watt hps about 20inches any ideas help much needed thanks

 

[golfnrl]

Hi growell...how often have you been watering? 4" high, I'm guessing about 2-3 nodes? Sounds like you might be overwatering. Pictures? If you haven't already go over to GWE and search how to water. I suggest this because I have been right where you are with your plants. Overwatering and PH fluctuations are common problems. I have found this out the hard way.

 

[MeEasy]

I'm with you on the overwatering and I'm gonna go out on a limb and say your soil has nutes along with the nutes you are giving em is to much. In soil you shouldn't need to give em nutes for the first month at least.

 

[Gregg]

Looking at those photos I'd say you're over watering. Plants that size need about a half cup a day each. Those lower leafs won't be coming back.

 

[growell]

thanks everyone for feed i will try suggestions but do u think they are small for 25 days old or round about right

 

[golfnrl]

I'm not sure whether they are small for their age. But really what you are talking about is how fast they are growing. I've found that once the conditions are dialed in the plants will explode with growth. They'll survive in less than ideal conditions but they will grow slower and the yield won't be as great.