Jack Herer Seedling Lower Leaves Yellowing

@Oldguy I seen you replying and knew I could beat you :wink:

So long answer is @Oldguy is correct

Water first to see if soil will give the nutrients the plant needs to stop the yellowing.

Plants need roots, roots need water /nutrients

Wait a day or two and if the yellowing gets worse and moves up the plant. Lightly feed


That’s when I was trying to find the specs. :joy::joy::joy:

1 Like

Those crappy leave are the cotyledon, they are formed from the plant sprouting from the seed and can tell you a great many things if you watch them carefully

They will tell you, if watering correctly, when they plant could use nutrients for your first feeding. Try to keep an eye on those for future grows.

Also get rid of the Scotts soil and pick up some coco coir, or fox farm soil. Fox farm will have little - a lot of pre mixed nutrients. Coco coir will give you the ability to start with a clean slate or no nutrients

1 Like

Couldn’t agree more. Solid advice. :+1:
Happy frog is an excellent starter. :v:

1 Like

Thanks all for responses!

I would love to get my hands on Fox Farm , but unfortunately cant find it in Aus so I may have to build a suitable soil from scratch.

Also forgot to mention I am using distilled water (using a home distiller) for the misting & will also use it for future watering.
Q/ Is watering from the bottom tray a good idea? i.e. pouring into the tray & having the soil suck it up?

@granulat ,

I see you joined us in Sept. So with that…
Welcome to ILGM and to our community of awesome fokes
Ok, see that mix you have used, I posted a pic of the N.P.K All 14s that’s kinda high for seedlings. and then what you are adding + NUTRIENT BURN Plus the fact they are only 3 weeks old. I would just water for about two weeks then just add half the nutrients,
And while you are add it, lower that light a bit. See how she is getting tall. She is reaching for that light.
I’ll be watching.

B Safe


@granulat. [quote=“granulat, post:11, topic:38307”]
Q/ Is watering from the bottom tray a good idea? i.e. pouring into the tray & having the soil suck it up?
Short answer. No.
Pots should be elevated so they don’t sit in the wet.
Roots will stay too wet and cause all sorts of problems.
Cannabis likes a wet to dry cycle for watering. :+1:
And also I forgot to welcome you as well. :wink::v: Welcome to the best grow show on earth. :grin::wave::wave::wave:


Thanks Will, but I don’t think that’s the product I’ve been using.
This is the link for the product description of the Seed Raising/ Cutting mix I’m using:

but unfortunately it doesn’t mention NPK ratios there or on bag.

Thanks for lighting tip I’ll adjust it.


Thanks for that.
I actually was planning on adding just enough in the tray so it sucks up dry within an hour without sitting in the wet, I’ve done it with other herbs.
But to be safe I’ll just water it from above in a circle away from the stem.


My N<P<K is on the back of the bag bottom left…it really is a big thing and the way you are going to water is a good thing


Don’t forget to PH your nutrients after adding everything in!
6.2-6.5 for soil. Happy growing.


Hi again guys, got a problem that sprung up.
I’ve been using a clear pot - I should have covered it up.

When I took it out of the tent into normal light - I now see that there are a few moldy spots (or algae?) on inside of container - see pics.
Patches of green/brown

Is this fixable?
Should I transplant & remove those bits?

Transplant, or spray paint black. The algae will die when in the dark. @granulat

1 Like

Thanks for that.
I’ve since cut those bits out with a boxcutter, then covered the whole outer area with duct tape.

What do you guys think of these leaves?

They seem too clumped together - I have feeling they should be more spaced out.
And curved down?

Also a dark edge around outer surface of leaves - possible calcium deficiency?
Mostly on older leaves.

I sprinkled some lime on the soil, so during watering more calcium will hopefully be added.

To counteract slight alkalinity of lime, I water with a slightly acidic mix, by adding a small amount of vinegar to the water.

It has grown since the last post, but leaves still have that dark perimeter. Anyone know when this will disappear, assuming it is calcium deficiency?

@granulat Those leaves won’t ever recover.

1 Like

You think they are at least consumable?