Holes in leaves - and I need to go on vacation for the weekend!

Hi guys

Title says it all! These weren't there yesterday, suddenly appeared today. Some kind of bug? I hope to god not spider mites. I don't have a good magnifier yet, relying on close up photos and manual inspection with an old skool magnifying glass.

I have to go away this afternoon so I'm really keen to identify the problem and take any action necessary today.

My uneducated guesses are:

-spider mite or other pest
-possible burn from being splashed with nutes when watered - but these appeared two days after being watered!
-nute burn perhaps? They are growing in coco so I've been feeding them every time. Should I give it a light flush if so?

In addition to any diagnosis you may be able to offer, please could you suggest what action I should take? TIA!





Here are some pics of the other affected plants:



Just beginning on this one it appears:

the first pic looks like a good old fasion cat chomp. but the last pic shows proof of a calcium defficency. it is not a bug or burning

did you use lime in the mix?

It doesn't look like a bug to me. Are there any other signs of pests?

and are the plants outside?

weed nerd113 said:

the first pic looks like a good old fasion cat chomp. but the last pic shows proof of a calcium defficency. it is not a bug or burning

Click to expand...

I was going to say calcium, so I'm with him unless I can find something different

No signs of pests from what I can see without a microscope.

They are indoors under 400W MH

They are being fed with Canna coco a&b 20ml in 10 litres every three days or so.

Would a calcium deficiency cause holes in leaves like that?

No lime in the mix. I am using straight up coco

PH is just under 6 (using a liquid kit)

Check ph first.

sorry posts overlapped. It can cause distorted growth so I would say yes. Perhaps the holes grew as the leaf formed. The ph is good. add some calmag

edispilf said:

Check ph first.

Click to expand...

PH is solid. runoff is bang on 6.

Haha yes post overlap again sorry!

So:

NOT over fert?
NOT pests?
NOT burn from splash and light?

I am able to get some cal mag before I go. Unfortunately I have just watered and fed them. Should I water again - until runoff - with just ph water and calmag?

edispilf said:

Perhaps the holes grew as the leaf formed. The ph is good. add some calmag

Click to expand...

I don't think so, these holes weren't there yesterday. I give my plants a fairly good look over each day and there was no sign of these holes then. I topped some of them 3 days ago so growth has been slow to non-existant on those - particularly the worst affected. So, the leaf that has the problem has been that size for a couple of days.

like edispilf said hit it with a splash of cal mag liquid to give it some instant relief. next time mix soil with dolomite lime you really cant use to much of it and it will give you a balanced ph plus all the cal+mag you will need. better get on top of it or you will be chasing it if it gets away from you. as of now it seems to be early stage. would not hurt to start using the entire spectrum of nutes. some compost tea with some processed sea weed would hit all your necessary trace elements too

its fine to water it it one more time just dont make a habbit of it

Dude you seem to have missed - I am growing in coco not soil. Ph is fine at 6.0, I should not be adding lime or compost. I am using Canna Coco A&B nutrients.

Calmag may be an issue, I am in soft water area. But I still want to know for sure - can calmag deficiency really cause holes to develop in fairly established growth?

were they yellowing there before?

lime is not just for ph and yes it can

i said compost tea you know beneficial microbes trace elements all that good stuff not compost and to spray it on the foliage

the last pic clearly shows it and if you havnt been using it of course its cal mag