Tips turning yellow in veg

[Gward20]

Hi, does anyone have any idea what has caused my plants leaves to go like this ? Thank

[GMO]

what feeds you using mate?

looks like they had a touch of PK early from here

[Gward20]

Just canna a & b and rhizo tonic, since taking this picture I gave them a feed of canna a & b and calmag and it’s got worse. It’s only happening to 1plant though. I’m thinking of giving here a good flush of phd water and seeing if that helps.

[Gward20]

Also I only use them about 1/3rd strength. For a 10l mix I put 15ml A + B and about 8ml rhizotonic which usually gets my ph about 1.1. Both nutrients recommend 4ml to every litre so I don’t think it’s nutrient burn. Ph 5.7-5.9

[Gward20]

Thanks Marcus i think that’s what I will be doing today, should I flush and then give a feed of a+b or flush then a day or 2 later feed the a+b ?

[Gward20]

Okay thanks Marcus I appreciate the help

[kbag]

Marcus is spot on with using cal/mag you have to watch out as it interferes with the uptake K and vice versa in coco. Good flush and back to basics should see you fine.

[Gward20]

Thanks kbag, any suggestions on how many litres to put through them ? Using 20l airpots

[kbag]

As a rule its 3x the pot size what will be 60 liters through each pot ouch lol. I normally take one plant at time into the bathroom and feel the bath with warm water and cold to get the water temp up to about 20/23c . I place a grill across the sink put the plant on the grill. I grab a jug and just keep going until my run off matches my base water EC. Once done i feed straight away.

[Gward20]

That’s gonna be some hard work haha, will be flowering in a 1.5m x 1.5m under 2 315w cmh