please help! What is causing this discolouration?!

[LeafLife]

Hey guys! New member here and fairly new grower:) in my second year and things were going great until now. So I have given these plants calmag a couple weeks ago as I noticed a calcium deficiency, it cleared up for a couple weeks and now it’s back and getting worse, which makes me think I got it wrong. Ph of soil is between 6-7, I give ph’d water between 6.2 and 6.3, I have given coffee ground blend during veg, wood ash blend for potassium and phosphorus in flower stage… as I thought it might be this.., please can someone just tell me what is going on! I’m loosing the will:( first two pics are my purple punch, both old and new leaves effected, and last 3 are my northern lights both old and one ew lead effected. Have they got different deficiencies? Any help would be so appreciated! (My thinking is purple punch has calcium deficiency and northern lights has potassium/phosphorus?)

 

[LeafLife]

Forgot to add specs:

Indoor
Soil
No bad pests, just a few nats which wood ash sorted.
Purple punch and northern lights
Indica
flowering Stage
in flowering stage for about 3 weeks
2 plants
Soil ph between 6-7
fan in tent
Temp is 25c
Humidity ranges from 45-51%
Watered every 2 days
Natural coffee ground blend in veg, calmag in veg and wood ash blend in flower with a little calmag
Tent is 6foot tall and 1m x 1m x 1m x 1m
Light used meizhi r90 450w , length from plants is 12-16inches

 

[Nesta028]

Can you post a pic of the entire plant?

 

[LeafLife]

Of course, here they are out of the tent:) 1st is purple punch and 2nd is northern lights, which I think has stunted at some point as it is quite small. Both autos

 

[LeafLife]

Had to take them out as the light doesn’t allow my camera to work properly

 

[GNick55]

you missed their need for a slight increase of calmag..
light might be a bit close also

 

[GNick55]

what’s this white stuff?

 

[GNick55]

is this a mold on the soil surface?

 

[LeafLife]

Noooo nooo no ahaha the white stuff is also wood ash:) like I mentioned there were a few nats flying about in there so I added some wood ash to tops of soil and foliage, wood ash kills the waxy coating of bug pests which in turn kills them. No more nats so it must’ve worked! Forgot to mention I’m doing the whole thing organic, making my own nutrients like the coffee blend and buying 100% organic nutrients like biobizz, which I used their calmag and ph up and down.

So you reckon I’ve not upped the dosage of calmag enough? :))

 

[LeafLife]

I did think the lights might want to be further away, but I was following the height given from the light company itself, what measurement would you recommend? Also to note that the northern lights is considerably smaller than the purple punch, so I’ve raised it to the same height.

 

[GNick55]

not much you can do at this moment as your close to finishing. if anything lower your nutrients at least anything with high nitrogen..
your more like 5 weeks give or take into flowering..

 

[LeafLife]

not much you can do at this moment as your close to finishing. if anything lower your nutrients at least anything with high nitrogen..
your more like 5 weeks give or take into flowering..

Thats what I was thinking, sadly I didn’t have a calendar to mark the date when I started so I’m having to go off of rough estimates… I’ve cut out all nitrogen and have just given one more dose of calmag mixed with wood ash blend, would you say to flush from now? Thank you!!!

 

[Moshmen]

I’ll add or mention overwatering the leaves on the second plant look swollen?

 

[GNick55]

Thats what I was thinking, sadly I didn’t have a calendar to mark the date when I started so I’m having to go off of rough estimates… I’ve cut out all nitrogen and have just given one more dose of calmag mixed with wood ash blend, would you say to flush from now? Thank you!!!

i wouldn’t flush just lower the nutrients a bit till a minimum amount (2-4 ml/ gallon) until finish kinda thing..

 

[LeafLife]

I’ll add or mention overwatering the leaves on the second plant look swollen?

It did get overwatered in first two weeks of veg, I forgot to get rid of water run off,.. silly mistake, but it recovered quickly has been ages since. Northern lights tend to have fat leaves. Only difference between the two is I’ve taken the fan leaves off the first one so it had more light to buds/put more growth into buds, which has worked, but I didn’t do it on my northern lights, which might explain why it’s still so fat and bushy, maybe I should’ve?

 

[LeafLife]

i wouldn’t flush just lower the nutrients a bit till a minimum amount (2-4 ml/ gallon) until finish kinda thing..

Thanks man!:)

 

[skaterdude]

It did get overwatered in first two weeks of veg, I forgot to get rid of water run off,.. silly mistake, but it recovered quickly has been ages since. Northern lights tend to have fat leaves. Only difference between the two is I’ve taken the fan leaves off the first one so it had more light to buds/put more growth into buds, which has worked, but I didn’t do it on my northern lights, which might explain why it’s still so fat and bushy, maybe I should’ve?

I would not remove fan leaves at this point unless they are turning brown and fading. Mature leaves produce energy, they don't sap energy; light on the buds isn't generating energy flow in the plant.

 

[LeafLife]

I would not remove fan leaves at this point unless they are turning brown and fading. Mature leaves produce energy, they don't sap energy; light on the buds isn't generating energy flow in the plant.

I removed them a while back, and the plant is still full of leaves, and is doing significantly better than the northern lights which I didn’t prune. Pruning is good for any plant surely? Gives more focus on the flower? Whatever the answer it’s seemed to have worked how I wanted it to

 

[skaterdude]

I removed them a while back, and the plant is still full of leaves, and is doing significantly better than the northern lights which I didn’t prune. Pruning is good for any plant surely? Gives more focus on the flower? Whatever the answer it’s seemed to have worked how I wanted it to

Pruning to focus growth can be good, especially considering apical dominance. Also, removing leaves that are shaded likely doesn't hurt much. The Purple Punch plant caught my eye because it doesn't seem to have a lot of leaves, and leaves are what generate the energy to produce the compounds in the buds we all want ;)

 

[LeafLife]

Pruning to focus growth can be good, especially considering apical dominance. Also, removing leaves that are shaded likely doesn't hurt much. The Purple Punch plant caught my eye because it doesn't seem to have a lot of leaves, and leaves are what generate the energy to produce the compounds in the buds we all want ;)

To be honest most leaves I’ve removed on the purple punch have been damaged ones, the leaves on it are quite thin but always have been and it never really produced the big fan leaves you visualise when thinking about a cannabis plant, hopefully it still has enough leaves to generate energy:) thank you for the advice:)