Day 17 from seed and need some help!

[DEVGRU_420]

Day 17

Currently feeding at 1.3ec
Canna Coco A 7ml
Canna Coco B 7ml
Canna Calmag Agent 4ml
RH 57-62
Temps 78-83
Light 40+ inches away.

Still having some leaf edge curling along with a few rust spots. New growth looks fairly healthy. Should I continue with canna's chart on "light feed" or should I bump it up to "normal feed" Normal feed would be 8.7ml of A and B compared to 7ml at light feed. I'm also using canna's water method, weigh the cup right after watering and when it gets to 50% of the wet weight water again.
Any tips would be greatly appreciated. Thanks dudes!

 

[DEVGRU_420]

Run off: 6.0ph 630ppm

 

[HempKat]

I would say rewatering when it's just 50% dry is too soon. I never measured it with a scale I always used what is called the lift method which is more subjective as it's just you making a guess on how dry it is but I would think you might want to hold off until it's down to more around 10% or 5% of the wet weight which in cups like that should be no more then every 3 days unless maybe temps in the room are very cold which it doesn't sound like they are. I never measured ec or ppm when I grew in soil but in soil a ph of 6.0 is a bit on the low side. I would say you should shoot more for 6.5.

As for the feeding schedule I never fully trusted manufacturer schedules for anything more then a rough idea. I was always taught to read the plant which means if you aren't seeing a deficiency you probably don't need to increase things. See the manufacturers want to get you to use as much of their product as they can because the more you use the more your end up buying. Plus it's not like all strains have the exact same needs some need more of one nutrient or another and others need less. So it's really difficult to buy into a 1 size fits all routine or schedule. It would be nice if it were always that simple but unfortunately it isn't. For the most part your plants look okay, there is a little something going on but that could just be the result of watering a little to frequently and having a ph that's a little too low. I would say before you go increasing the amount of food try watering a little less often and getting the ph up closer to 6.5. If that doesn't get them looking better then maybe at that point bump the feed up a little.

 

[troutman]

^^^ I agree in increasing pH a little.

Plants in tiny cups stress out if left too long in them. So I think it's time to transplant as well.

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