First grow brown tips and yellow edges, help needed.

[sss_]

Really hoping someone on here could give me some help?

Newbie grower growing one Royal Jack auto in Plant Magic soil with Led light and have been using Canna Terra Flores (5ml per litre) and Calmag (0.5 ml per litre) since flowering. Water pH has been between 6 to 6.5, humidity around 40 to 45% and temps between 23 to 30ºC.

Now three weeks into flowering and most leaves have brown tips and edges. Older leaves are affected much more, with the brown tips only appearing on new growth after several days.

I've done a bit of research and am thinking potassium deficiency but it's been suggested that overfeeding could be the cause. If it's overfeeding wouldn't this affect new growth immediately?

Any help would be appreciated.

 

[420Forever]

hey @sss_ and to afn! sorry to hear of ur troublez & me the first to admit to not bein a plant doctor, but plenty here are, so jus hang tight & i'm sure they'll chime in...patience grasshopper

ppp &

 

[sss_]

Thanks for the nice welcome

 

[sss_]

Here's a better pic.

 

[Citadel]

At first glance overfeeding and heat stress look likely culprits to me. 5ml p/l seems rather high but I've never used those nutes before.

Sent from my PRA-LX1 using Tapatalk

 

[Waira]

I'm thinking overfeeding too,... K toxicity in particular, which ironically looks nearly identical the K defc.! but the tell tale margin teeth burning is the clue it's K related here, and with 5ml/L going in, it might be too much, cumulatively,...
I think a "reset" flush is wise here, and take pH and ppm reading as you go... 2-3x pot volume with low ppm water preferred, no need to pH that.... then last pour, add in 1/4 strength nutes to balance out what's been lost,...

 

[Mañ'O'Green]

@sss_ does the Canna Terra Flores have a guaranteed analysis statement? If so would you take a snapshot of it for me. I looked around but they don't seem to share it. Tag me with it please, Thanks.