Nute deficiency, or ph?

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CaptainAdrock

Member
I am using distilled water in a dwc. I used flora gro series in first week and started seeing yellowing (well lime green really but looks bright yellow under the purple led) on new growth and stems. I added cal-mag (which I didn't know originally was needed with distilled water). My question is, should the nutes and cal-mag be all that's needed with distilled water? Could this be a ph issue, because I'm using a color chart and it seems right at 6.0? And when will I know if the cal mag made the plant happy? Will the yellow turn green again or will new growth just start being green instead of yellow?
 

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Johiem

Johiem

Well-Known Member
Thank you, sincerely. Have her roots emerged from the net pot yet? Those stones or whatever they are look very dry especially if her roots are still looking for water. She shouldn't need much if any nutes yet. I don't start them on nutes till after their 3rd pair of multi fingered leaves. She does look a little light but that nice healthy first pair of "true" leaves (the single leaves) say she should darken in time. A calcium supplement is needed with both distilled and r.o. waters and you'll probably need a magnesium supplement had you not already got the cal-mag. Your rez is already setup and bubbling right?
 
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CaptainAdrock

Member
Yes she has a couple of roots hanging below the net pot, which is 4 inches I believe. It is wet all around the net pot so I don't think water is an issue. Those are just the top layer that are under the light. Yes the system is up and running correctly. I noticed the change from the dark green of the first true leaves and after some research realized I was lacking cal mag if using distilled water. So she looks healthy otherwise? She's growing rather quickly. I'm just wondering, do you think the missing cal mag was all she needed?
 
hotrodharley

hotrodharley

Well-Known Member
CaptainAdrock said:
Yes she has a couple of roots hanging below the net pot, which is 4 inches I believe. It is wet all around the net pot so I don't think water is an issue. Those are just the top layer that are under the light. Yes the system is up and running correctly. I noticed the change from the dark green of the first true leaves and after some research realized I was lacking cal mag if using distilled water. So she looks healthy otherwise? She's growing rather quickly. I'm just wondering, do you think the missing cal mag was all she needed?
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Net pot is NOT supposed to be wet. The bottom of the net basket needs to clear at least 1/2”. If it’s sitting in the soup that’s likely your problem.
 
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CaptainAdrock

Member
hotrodharley said:
Bet you don’t have but maybe one root touching the soup. Have you checked? Top feed by pouring solution through a few times a day until enough roots are long enough.
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The 1.5in rockwool I started the seed in is nestled near the bottom of the net pot with. Layer of clay pebbles between the rockwool and bottom of net pot. If I top feed some of the soup twice a day, will that soak the rockwool and possible cause root rot? This is my first grow so its trial and error and forum browsing. Also does opening the bucket to scoop out some soup twice a day bad for the roots?
 
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CaptainAdrock

Member
The most concern is from the two first leaves (not true leaves, but the first two sprout leaves) starting changing color on the tips. Here is a picture, it's a little hard to see because those leaves are small and a bit covered
 

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hotrodharley

hotrodharley

Well-Known Member
CaptainAdrock said:
The 1.5in rockwool I started the seed in is nestled near the bottom of the net pot with. Layer of clay pebbles between the rockwool and bottom of net pot. If I top feed some of the soup twice a day, will that soak the rockwool and possible cause root rot? This is my first grow so its trial and error and forum browsing. Also does opening the bucket to scoop out some soup twice a day bad for the roots?
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No it won’t. That’s why you only do it a couple of times is to keep it wet enough with solution for it to grow more roots.
 
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CaptainAdrock

Member
hotrodharley said:
No it won’t. That’s why you only do it a couple of times is to keep it wet enough with solution for it to grow more roots.
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Awesome. Gave it about 100 ml of top feed this morning, will again this evening. She's my first and only girl so I gotta take care of her, but don't want to make the newb mistake of doing too much. Thanks for the help.
 
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