Ph issue/yellow tips

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meerkat67

Active Member
I’m a newbie grower, my question is. I have a bunch of seedlings that are roughly two weeks old. I grow in coco, I ph my nute res to 5.9 but I’ve just seen my tips are just turning yellow.. I checked with my probe at the root zone and that is sitting at 5.0.. this is too low right? How would I remedy this without taking my res out of optimal range?? Humidity and Temps are perfect and no fresh air issues have fans. Light is about 500mm away from canopy.. Love the threads guys, so much good information! image.jpgimage.jpgimage.jpg
 
MickFoster

MickFoster

Well-Known Member
meerkat67 said:
They are currently in 750ml pots, so I fed them 250ml at a time every 24hours.. the reason it’s so frequent is only because that’s from wet to bone dry coco again..
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Do you get substantial run off every time you feed?
Coco should never get bone dry........if that's happening every 24 hrs., you need to either up-pot or start feeding twice a day.
 
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Phytoplankton

Well-Known Member
Overall they look pretty darn good, but, I'd up pot those into maybe 3 gallon pots, looks like they will be rootbound soon. As far light distance, we'd need to know what kind of lights, true draw wattage. They look a little stretchy. If it were me I'd start at the manufacturers suggestion and move them down a couple inches after a week or so, if everything looks good. Were those from seed or clones? You've already got alternating nodes.
 
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meerkat67

Active Member
Phytoplankton said:
Overall they look pretty darn good, but, I'd up pot those into maybe 3 gallon pots, looks like they will be rootbound soon. As far light distance, we'd need to know what kind of lights, true draw wattage. They look a little stretchy. If it were me I'd start at the manufacturers suggestion and move them down a couple inches after a week or so, if everything looks good. Were those from seed or clones? You've already got alternating nodes.
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Yeah sweet, I’ll start with re potting. I have them ready to go and was going to do this over the weekend. I’m running 600w hps as they get bigger and what not I’ll be flicking the other 600w one on.. that should be good over 17 of them? Clones mate, mighty mite and white rhino.
 
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meerkat67

Active Member
MickFoster said:
Do you get substantial run off every time you feed?
Coco should never get bone dry........if that's happening every 24 hrs., you need to either up-pot or start feeding twice a day.
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Okay, this makes sense! I usually do give decent run off but have been worried about over feeding as I had issues with this last time! Very helpful! Thanks!
 
SheeshM

SheeshM

Well-Known Member
Pretty sure I see early signs of flowering when zooming in. If they're clones that makes them photo period so they flower when they are on 12/12 lights off/on. What's your lighting schedule?
 
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Phytoplankton

Well-Known Member
SheeshM said:
Pretty sure I see early signs of flowering when zooming in. If they're clones that makes them photo period so they flower when they are on 12/12 lights off/on. What's your lighting schedule?
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I thought that at first too, but they are clones, so the alternating nodes and occassional caylxes means they are mature (old) enough, but until he flips them they will stay in veg. Pretty common with clones.
 
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meerkat67

Active Member
Phytoplankton said:
I thought that at first too, but they are clones, so the alternating nodes and occassional caylxes means they are mature (old) enough, but until he flips them they will stay in veg. Pretty common with clones.
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Yeah that’s my understanding, all the clones I’ve done have very visible female sex organs fairly early on. Definitely not in flower yet!
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Hollatchaboy

Hollatchaboy

Well-Known Member
meerkat67 said:
Okay, this makes sense! I usually do give decent run off but have been worried about over feeding as I had issues with this last time! Very helpful! Thanks!
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Water to 25% runoff. You want to get all the unused nutes out, so the ratios stay as close as possible. You don't need to worry about overfeeding, unless you add too much nutrient to the water.
 
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meerkat67

Active Member
Hollatchaboy said:
Water to 25% runoff. You want to get all the unused nutes out, so the ratios stay as close as possible. You don't need to worry about overfeeding, unless you add too much nutrient to the water.
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Okay sweet, they are in 2.5L pots at the moment. What would be an ideal amount to feed each one at a time so I can work out that run off roughly you think?
 
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meerkat67

Active Member
Hollatchaboy said:
You're going to have to experiment and figure it out, but I would try 350-700 ml.
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Also, how frequently would you think I should be feeding. They are obviously in the coco, do I let it dry out to like 80% and they are still heavy or let them dry out more?
 
Hollatchaboy

Hollatchaboy

Well-Known Member
Again, that's gonna be something to experiment with. Plant size, humidity, and temp, are going to play a part, but I would think if everything is within range, once a day until roots start filling out the container, would work.
 
michojay

michojay

Well-Known Member
I just keep them wet. In coco you shouldn’t have an issue with overwatering. I water to 25% runoff 2 times a day once right at lights on and again usually about 8 hours later. This works for me will it work for you? Maybe but you’ll have to figure that out. The only time I’ve run into nute issues is when I let them get too dry.
 
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