Organic growing

Hi guys,
Just a question regarding organics.
I started my second ever grow from seed just over a month ago. I started in 1l pots and let the seedlings roots fill the pot before transplanted straight into 7gallon / 30l fabric pots in canna terra pro which im aware is already charged and will take you through the first 5 weeks of growth without having to feed. however, i also decided to premix dry amendments to each pot as id read that organic dry amendments can take up to 4 weeks to actually be usable for the plant. So i figured by adding it before transplanting, by the time the 4 / 5 week came, the canna terra pro nutrients would have been used and now the amendments i added will start to be used by the plant. for the first week or so i watered very carefully, knowing that the new seedlings root zone wouldnt be developed enough to use up all the water in a 7gallon fabric pot, so watered bit by bit until the plants got bigger and more established.
Its been about 3 weeks since then and the plants are getting bigger and I've now started watering right through, watering approximately 2 gallons water through each fabric pot ( 7gallons ) and that seems to be perfect, leaving me with about 10 % run off which the plants drink up within 30mins / 1 hour after watering anyway. When watering i firstly neutralise the tap water by using an organic pure vitamin c product called ecothrive neutralise, which instantly removed chlorine and chloramine from tap water. i fill up a 5 gallon bucket and mix 1 tbsp molasses, 1/2 tbsp epsom salts and i ph with bio bizz organic ph down to a ph of 6.5.

Ive noticed what i believe to be nutrient burn on the tips of some of my leaves on the new growth and was wondering if any of you organic experts could give me some advice please. Do you think it could be any of the amendments i added that are having a bad effect on my plants and if so will my plant grow out of it ? Im still in veg but want to flip to flower after 1 more week.

The dry amendments used and mixed into the canna terra pro 7 gallon pots were as follows......

60ml bat guano ( guanokalong ) 1.10.1
60ml seaweed powder ( guanokalong ) 1.0.1
60ml ecothrive charge ( insect frass ) 3.2.3
Lavaworm volcanic rock ( guanokalong ) no npk.

light used is a lumatek zeus pro 600w led.
ive got it hanging at 50cm from canopy at 50% power. I keep the temps at roughly 25 / 26•c and rh at approx 65 / 70% rh in veg. Although you’ll notice my temps dropped to 21.5•c in the pic as im based in uk and had a really cold day today.

ive attached pictures and any feedback would be very much appreciated, thanks.

When you pot up you should wait for the soils nutrients to be depleted. I’m not sure about it taking 4 weeks for the nutrients to work. Typically there are different size particles that get absorbed at different rates. Some of the nutrients you added could be activating quickly and the soil nutrients as well.

ok so it looks like you have a mag def. since you’re adding Epsom at that dosage I would say it may be getting locked out. If you’re over watering that can prevent the plant from taking up mag. Here’s some more info


And I would stop with the ph down. Let the soil do it.

I agree about the Lockout. Molasses has a low pH and maybe with your pH down it's too much? Or maybe it's too much K right now and it's causing the lockout. Either way, consider dropping it for awhile and see if there is any change.

I don't think you need molasses at all. Especially not during this stage of growth, and definitely not at every watering. I think it's best used during the last week or two of flowering to keep your microbes kicking.