Does anyone know why the top growth is gone lighter green

[Chrism]

Hi I'm 2 days into flower and have noticed that some of the tips are yellow and the plant has gone a lighter green in middle at the top does anyone know why this is plz

 

[Ninjadogma]

It's normal for plants to throw light green and yellow green tops during rapid growth spurts. They come in so fast the chlorophyll doesn't get a chance to fill in right away. Yellow tops can also be a sign of iron or sulfer deficiency but I don't think that's what's going on.

 

[Chrism]

It's normal for plants to throw light green and yellow green tops during rapid growth spurts. They come in so fast the chlorophyll doesn't get a chance to fill in right away. Yellow tops can also be a sign of iron or sulfer deficiency but I don't think that's what's going on.

They also have a slight yellow tip

 

[Smokey_LaFleur]

May just be the lighting, but they look a bit pale to me. What are you growing and what are you feeding, if anything?

 

[Chrism]

May just be the lighting, but they look a bit pale to me. What are you growing and what are you feeding, if anything?

Feeding canna a and b

 

[ThaBadHippie]

You’re basically feeding them the maximum amount and they are growing as fast as they can. If anything you can back down on the nutes, otherwise you’re doing fine.

 

[Chrism]

I've took some more photos on a better camera because it's happening on the smaller ones too is this normal my first ever grow

 

[Ninjadogma]

Normal during growth spurts but can also be an early sign of deficiency being triggered by light stress. The brown spots on a couple of those fans are the bigger issue, may be indicating an issue with calcium uptake. Phrasing it that way because it may be present but the plant isn't utilizing it so it could just be lockout.

 

[Grownsince95]

I've took some more photos on a better camera because it's happening on the smaller ones too is this normal my first ever grow

The plant on the back right is showing some taco-ing and Ca spots might be environmental like light/heat/air on that one.

 

[Chrism]

Normal during growth spurts but can also be an early sign of deficiency being triggered by light stress. The brown spots on a couple of those fans are the bigger issue, may be indicating an issue with calcium uptake. Phrasing it that way because it may be present but the plant isn't utilizing it so it could just be lockout.

So what should I do

 

[ThaBadHippie]

from what I gather. Turn lights down and see if that helps.

Next. What is your medium and PH of feed, how often are you feeding etc

 

[Chrism]

Normal during growth spurts but can also be an early sign of deficiency being triggered by light stress. The brown spots on a couple of those fans are the bigger issue, may be indicating an issue with calcium uptake. Phrasing it that way because it may be present but the plant isn't utilizing it so it could just be lockout.

from what I gather. Turn lights down and see if that helps.

Next. What is your medium and PH of feed, how often are you feeding etc

Already done that they on 400w pH of feed is 6.1 and using Coco and feeding daily

 

[ThaBadHippie]

you’re fine. The brown spots are on the older leaves, and you turned your light down. Come back in a week and get the PPFD meter on your phone and calibrate it if you can .

Every 2 weeks you can turn your light up, if led in flower or let the plants grow into it.

Your plants lookin good for the most part

 

[Chrism]

The only thing I’d suggest is ph to 5.8, or add some cal mag? Otherwise you’re fine. The brown spots are on the older leaves, and you turned your light down. Come back in a week and get the PPFD meter on your phone and calibrate it if you can .

Your plants lookin good for the most part

I've just ordered a lux meter so was gunna use that. can't seem to get that app to work on my phone and I've got calmag, not used it for quite a while tho because I heard not to use to much but ok will start adding it to some feeds again and with the pH I've been advised all different numbers all between 5.8 and 6.2 and when been mixing nutes been finishing with pH of between 6 and 6.1 so thought best not to mess with pH down should I of done?

 

[ThaBadHippie]

After reading the post again, I’d say you’re fine and don’t touch anything

Also you want a par meter, not a lux. Especially if you’re LED

To get the app to work on both my phones and iPad. You use the par map that the light supplier has given, if they have one, and calibrate with a ruler at 24” etc at 100%. Worked for me.

Also my plants had the same reaction to too much LED light. Brown spots etc.

 

[LoveGrowingIt]

I'm 2 days into flower and have noticed that some of the tips are yellow and the plant has gone a lighter green in middle at the top

It's a critical time in a plant's life because it is diverting its resources from vegetation to reproduction, and in between it stretches and that's very demanding. Some of these plants are showing signs of being pushed to their limits. The quickest way to help them is to lower the light intensity so they are within their metabolic capabilities.

 

[Chrism]

It's a critical time in a plant's life because it is diverting its resources from vegetation to reproduction, and in between it stretches and that's very demanding. Some of these plants are showing signs of being pushed to their limits. The quickest way to help them is to lower the light intensity so they are within their metabolic capabilities.

I've got it on 400w should I turn it down I was gunna order a lux meter today I can't afford a par meter spent far to much on this grow already is it waste of time says it works on LEDs

 

[Chrism]

The yellowing isn't going but if I'm not mistaken these babies are starting to bud is everything looking ok? Or should I be concerned the lighters tops aren't going

 

[Chrism]

 

[ThaBadHippie]

Literally looks perfect