Young plants leaf tips are turning yellow

[RobotCake]

Here are a couple of pics of a Cali Weed Blue Dream in Dr. Organics living soil (this is my first time with living soil). The leaf edges are going yellow. I was expecting yellowing to occur when the soil needs amending and I did reamend the soil two days ago so maybe it takes some time to get her colour back? She's currently in a 1 liter fabric rhizo pot and is three weeks old.

[Samwise Gamgee]

Here are a couple of pics of a Cali Weed Blue Dream in Dr. Organics living soil (this is my first time with living soil). The leaf edges are going yellow. I was expecting yellowing to occur when the soil needs amending and I did reamend the soil two days ago so maybe it takes some time to get her colour back? She's currently in a 1 liter fabric rhizo pot and is three weeks old.

Looks to me like the soil may be a bit rich for plants that young, probably better off starting them in an organic potting mix, and move them up to the richer soil when they are bigger!

These don't look under fed to me, they look over fed. Usually under fed will show on the new growth, toxicities will show first on the older growth, as plants feed root to tip.

[RobotCake]

Looks to me like the soil may be a bit rich for plants that young, probably better off starting them in an organic potting mix, and move them up to the richer soil when they are bigger!

These don't look under fed to me, they look over fed. Usually under fed will show on the new growth, toxicities will show first on the older growth, as plants feed root to tip.

This discoloration only started about 4 or 5 days ago. Does that still fit with the soil being too hot?

Does this potting soil seems ok to use for seedlings:

Edit: This one is probably better right?

[Samwise Gamgee]

How long have they been in that soil?

Either of those look good, personally I would go with the bag that is marked up as potting mix, rather than the one that says Light, as you really don't know what they mean when they say light lol.

I would repot them and use either of the above, and when you repot them try and shake off as much of the soil around the roots that you can, without damaging the roots where possible.

If you have any SuperThrive or B vitamins, I would add some to some plain water and give the plants a good drenching the day before you pot them up, as this will help the plants cope with stress caused, and they will recover faster.

Good luck

[Samwise Gamgee]

Scratch my last looking at that potting mix it has added nutrients with an NPK of 20.20.20

That is way to high for this stage of growth, and more designed for plants that are bigger.

The light mix sounds better, and more aimed at seedlings and young plants, although they don't state the NPK which isn't helpful.

It does say an EC of 1.2 thou, which isnt far away from where you want to be at this stage of growth.

[MrG]

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[V8]

I agree with Sam. The potting mix is to strong. I personaly in soil use Biobizz all mix or Canna TTerra Proffesional when i grow in soil. Never had them burn and it will feed yoour plant 3-4-5 weeks. Depending on pot size

V8

[RobotCake]

How long have they been in that soil?

Either of those look good, personally I would go with the bag that is marked up as potting mix, rather than the one that says Light, as you really don't know what they mean when they say light lol.

I would repot them and use either of the above, and when you repot them try and shake off as much of the soil around the roots that you can, without damaging the roots where possible.

If you have any SuperThrive or B vitamins, I would add some to some plain water and give the plants a good drenching the day before you pot them up, as this will help the plants cope with stress caused, and they will recover faster.

Good luck

They've been in it for three weeks, they germinated in there. This has happened to all the seeds I planted in this soil. Some had slight nute burn initially on the first two leaves (but not the plant in the pics), so obviously the soil is too hot, but the rest of the growth after that was fine which made me think soil wasn't too hot. But after some time of seemingly healthy growth they all started to yellow and then die (one even started going black before it died).

Anyway I only have two left, the one in the pics, and another that is a few days younger that so far apart from some burnt tips on its very first two leaves seems to be growing perfectly fine, but I suspect it will soon start to yellow like the others. The soil being too hot does seem to make sense. The other plant that seems fine has had no amendment added to the soil since I've only been amending the soil when I see yellowing which hasn't happened to the other plant yet.

Another thing is these seeds seemed to be weird from the start, normally my seeds sprout on the third or fourth day but these took eleven to fourteen days.

[Samwise Gamgee]

They've been in it for three weeks, they germinated in there. This has happened to all the seeds I planted in this soil. Some had slight nute burn initially on the first two leaves (but not the plant in the pics), so obviously the soil is too hot, but the rest of the growth after that was fine which made me think soil wasn't too hot. But after some time of seemingly healthy growth they all started to yellow and then die (one even started going black before it died).

Anyway I only have two left, the one in the pics, and another that is a few days younger that so far apart from some burnt tips on its very first two leaves seems to be growing perfectly fine, but I suspect it will soon start to yellow like the others. The soil being too hot does seem to make sense. The other plant that seems fine has had no amendment added to the soil since I've only been amending the soil when I see yellowing which hasn't happened to the other plant yet.

Another thing is these seeds seemed to be weird from the start, normally my seeds sprout on the third or fourth day but these took eleven to fourteen days.

Have to admit, its for the reasons above I don't grow canna in soil. You can find that even different genetics can feed at different levels, so if your doing a mix and match grow, you can find one plant finds the feed heavy, yet another is absolutely fine, this is also why I tend not to do mix and match grows, and stick to just one lot of genetics per grow.

In coco or hydro it kind of takes the guess work out, as you don't know what is in a bag of soil, and even if it does state the NPK levels on the bag, they can be affected on the amount of time since they tested it, if its been sat on a shelf. NPK ratio will alter especially if in relation to compost, as the longer it rots, the more nutrients it produces.

Tbh I would do what V8 suggested, use the light mix for seedlings, then at about 6 weeks old, get them in the richer soil, you will probably find you don't need to add anything feed wise until about half way through flower. At that point you could just buy a tomato plant feed, that's for fruiting, which is low in nitrogen, but high in phosphorus and potassium, and you will do good