Ca or mg deficiency?

[le0n.v6]

Morning folks it's been a while

 

Got some autos on at the min but 1 of them is going through some sort of deficiency or abundance

 

It's been crawling up rhe plant for the past week I thought it was ca def so upped the calmag to 1.5ml per litre and the feed to 2.5ml per litre, they are in the stretch phase week 2 or 3 of flower. Rest of the plant looks OK as do the other 2 on the same feed 

 

E2a: they are in coco/perlite (75/25) on RO water + canna feed (just a + b right now), ph is 5.9 - 6.2, daytime temps 25 - 26c and rh is around 60% run off ec is within .2 ec of the input (2.0ec)

 

been doing doing this 3 years now and still useless at diagnosing  maybe time to so some proper research, thank God for u guys 

 

Any advice appreciated

Edited 11 hours ago by le0n.v6

[Shumroom]

3 hours ago, le0n.v6 said:

run off ec is within .2 ec of the input (2.0ec)

You're not seriously feeding an auto at EC 2.0?? 

 

That's probably at least part of the problem,

combined with the lower temperatures that have been hitting the country. 

 

 

Do you have heat mats under the pots? probably not as I see collection trays? 

 

Have you been monitoring the root temperature in the pot of the affected plant? 

 

Atb 

 

 

 

[Hazeworks]

Were you already feeding them cal/mag, or only after you thought you had a problem?

[le0n.v6]

Was already feeding them 1ml per litre but this is the only 1 affected, the other two are on exactly the same feed, smaller but fine, no burnt tips etc

[Slippy One]

I was gonna ask what kind of oscillating fan you were using..