
Lbgrower
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I'm pretty sure it could be that light too @SMACKA. Investigate your roots and if your plant isn't drinking the water every couple days reduce the amount you give. Good luck bruh :)
Seems like you are swimming in some muddy waters there Smacka, so let me try and clear a few things up.
First thing is that Canna feeding schedule you posted with a picture of Brian the hedonist on it. Hate to break it to you but Canna don't need his sig to sell their gear so that chart is not legit. Get a chart direct from Canna my friend, and stop staring at Brian's ugly mug!
Second thing is that you probably haven't been told anything wrong, it's just that you maybe didn't give all the information when you asked the questions.
So when you showed a pic of a plant with mag def, it was confirmed that mag def is what you were seeing and that answer was correct.
But the question could have been: 'here is a pic of a sick plant but my nutes are well balanced so what could be the problem?'
The answer then would have been mag def caused by ph lockout, which requires a different treatment altogether.
Same with nute doses really.
Canna nutes are a commercial product designed for farmers with ideal conditions to drive production. It's exactly what we want but we have to bear this information in mind when we use it.
So for example, a 1000w sodium in a commercial room emits many photons of light and each one is pure energy to a plant, allowing it to convert one chemical into another. Obviously this process begins with the chemicals we feed it.
If you are only running 300w then the reduction in light energy means a reduction in the number of chemical conversions that can be made with a corresponding reduction in the requirement for source chemicals, even if the plant is the same size in both cases.
Also when we are managing plant height, many leaves are not in full light so even less photons are being harvested.
So when we scale down the light and the amount of leaves available to capture and process that light, we need to do the same with the food.
So to apply that to your situation,
Find out the Canna recommended dose for plants in stage 1 veg (stage 2 is the stretch so you are not there yet) and start feeding a little below that to account for less than maximum light / damaged / shaded leaves.
There is also clearly a lot of unused nutes already in the soil that will now be unavailable to the plants. Your choices there are to flush until the ppm going in and coming out is similar. Or I might be tempted to repot the plant into the same pot, but to brush away as much of the rootball as possible and to dump it back in the pot with as much new soil as possible.
I'm pretty sure it could be that light too @SMACKA. Investigate your roots and if your plant isn't drinking the water every couple days reduce the amount you give. Good luck bruh :)
The only thing to note when asking questions is to include all the info in the same post. Peeps won't read 2 or 3 pages to get all the background info, they will generally just look at the individual post and make a judgement on what they see.
The best tool to monitor overfeeding now is the original pic of the plant, showing its natural colour. If there is too much food then the leaves will become darker and too little will make the plant lighter than it should be. Obviously this is only the early signs and symptoms would get worse, but I don't really see that in your latest pics.
Building on what you already know, if you have a nitrogen toxicity then because you are using a balanced food you will also have a toxicity of everything else and would therefore be seeing signs of nute burn. So maybe it's something else.
My first thought when I see leaves curling up or down is that the plant is trying to tell me off about the watering schedule. Plants breathe air same as we do, so if you overwater a plant it is effectively drowning.
The way a plant responds to that is by making the surface area of the leaves as big as possible to allow for more evaporation of water. It does that by curling the leaves down.
When it is being underwatered, it does the opposite. It curls the leaves upward like a canoe to make the surface area smaller so it loses less moisture from the leaves as it tries to retain as much as possible.
That's why I suggested removing the old soil manually as an alternative to flushing it through.
Loving the pic of the case by the way.
2nd best case out there ;)
I remember looking at everyone else's builds and asking "why are we building intakes at the bottom of the PC Case, when there's a yoghourt container in front of it the whole time?"
Nice a Quantum Board panel!