GrowThings
New Member
I backed off the Canna A+B from 3.33ml/L to 2ml/L thinking it was overfeeding, but now I'm beginning to think based on the leaf colour that it's underfeeding, what're your thoughts? After all she is a very big auto..
Underfeeding Or Overfeeding?
- Thread starter GrowThings
- Start date
Aussieaceae
Well-Known Member
Ph?
Medium?
EC / PPM?
Any supplements, calmag, bloom booster etc?
Medium?
EC / PPM?
Any supplements, calmag, bloom booster etc?
GrowThings
New Member
Coco, Daily Watering, Not sure of PPM but it's based on my water hardness + Canna's light feeding schedule.
ph/5.55 - ph/5.78
2ml/L of Canna A & Canna B
0.5ml/L of Calmag
0.25ml/L of BuddhasTree Flower Burst
Aussieaceae
Well-Known Member
Which Canna a+b?
Do you have a feed chart for it? It should tell you the ec values.
PH of your feeds?
NPK values of your nutrients?
Nutrients every watering?
Watering how often?
Could be a few things, all this info will help towards getting a possible answer.
Based on the symptoms towards the tops of the plant, personally i find deficiency quite unlikely. If those same symptoms were more progressed towards the lower leaves, then i'd assume deficiency.
More likely PH or overfeeding to me.
Do you have a feed chart for it? It should tell you the ec values.
PH of your feeds?
NPK values of your nutrients?
Nutrients every watering?
Watering how often?
Could be a few things, all this info will help towards getting a possible answer.
Based on the symptoms towards the tops of the plant, personally i find deficiency quite unlikely. If those same symptoms were more progressed towards the lower leaves, then i'd assume deficiency.
More likely PH or overfeeding to me.
GrowThings
New Member
Feed Chart: (Based on 30L)
Canna Coco A&B Combined NPK: 5-4-3
Nutes every water, watering daily until 20% run off into collection tray, plants dont sit in run-off.
I always check ph before watering and ensure it's between 5.5 and 5.8.
Aussieaceae
Well-Known Member
Cheers,
Hard to tell the ec from the chart, because you're not supplementing canna boost. It's all good.
So, you're using a veg nutrient all the way through?
I noticed the buddha was at full dose according to a google search.
What's the NPK on the buddha boost?
Do you have a feeding chart for this one too?
PH should be cool.
I'd consider slightly reducing the nutrient each feed, but upping the feed frequency. Plants always seem to prefer it in coco, as they get larger.
For example, feeding 2x per day, with 10% runoff.
Little more info, please.
Edit: also the nitrogen value on your calmag would be handy too.
It can vary a lot with calmag. Anywhere from 1-4% i believe.
Hard to tell the ec from the chart, because you're not supplementing canna boost. It's all good.
So, you're using a veg nutrient all the way through?
I noticed the buddha was at full dose according to a google search.
What's the NPK on the buddha boost?
Do you have a feeding chart for this one too?
PH should be cool.
I'd consider slightly reducing the nutrient each feed, but upping the feed frequency. Plants always seem to prefer it in coco, as they get larger.
For example, feeding 2x per day, with 10% runoff.
Little more info, please.
Edit: also the nitrogen value on your calmag would be handy too.
It can vary a lot with calmag. Anywhere from 1-4% i believe.
Last edited:
GrowThings
New Member
Buddhas Tree is NPK: 0-10-8 and there is no feeding chart it just says to use 0.25ml per L in the first 3 weeks of flower and no longer.
Unfortunately I don't have the time to water twice a day I water them just as lights turn on at 6pm each day.
And the VitaLink Calmag NPK: 1.8 - 0 - 0
3rd Monkey
Well-Known Member
Looks fed well, needed light, still does.
Aussieaceae
Well-Known Member
Thanks man,
That V shape of yellow on the fan leaves, in my experience is usually indicative of a magnesium, or potassium issue.
But both being mobile, i'd expect to see the symptoms towards the bottom of the plant, and progress upwards when deficient. I'd also expect general leaf fade, and interveinal chlorosis. But we're not seeing this.
My thoughts...
It's quite a high pk value on the buddha. I realize it's only 0.25mL / litre, but i would try cutting that dose down to 0.15 or so.
Maybe lower the calmag slightly too. 20% volume to your Canna ab seems slightly excessive to me.
I'd also try feeding an extra time per day, and see how it goes.
That's what i would do.
I think it's just a little overfed, and the npk ratio might need a little tweaking too.
Good luck.
Edit: if it keeps it up over the next day or two, come back here.
Also if it does keep progressing, before you report back, check the ph of the waste.
It's pretty normal for coco to have waste readings above ph6. That is fine, and normal.
What would concern me, is if the waste ph reading was particularly low. It happens sometimes.
Don't worry about this for now. But if the problem persists, check the waste, and include it when you report.
That V shape of yellow on the fan leaves, in my experience is usually indicative of a magnesium, or potassium issue.
But both being mobile, i'd expect to see the symptoms towards the bottom of the plant, and progress upwards when deficient. I'd also expect general leaf fade, and interveinal chlorosis. But we're not seeing this.
My thoughts...
It's quite a high pk value on the buddha. I realize it's only 0.25mL / litre, but i would try cutting that dose down to 0.15 or so.
Maybe lower the calmag slightly too. 20% volume to your Canna ab seems slightly excessive to me.
I'd also try feeding an extra time per day, and see how it goes.
That's what i would do.
I think it's just a little overfed, and the npk ratio might need a little tweaking too.
Good luck.
Edit: if it keeps it up over the next day or two, come back here.
Also if it does keep progressing, before you report back, check the ph of the waste.
It's pretty normal for coco to have waste readings above ph6. That is fine, and normal.
What would concern me, is if the waste ph reading was particularly low. It happens sometimes.
Don't worry about this for now. But if the problem persists, check the waste, and include it when you report.
Last edited:
CannaCountry
Well-Known Member
Today's new grower has his / her job cut for them sifting out the decent information from the slag. When contradicting and or erratic information is presented with little logic, the propensity for someone to learn becomes extremely muddled.
I can't comment on the fact that you're growing an Auto...I don't run them.
I can't comment on your feed, because I don't use it.
What I can tell you is, sometimes, when growing in coco, if the plant dries out too much between feeds, it can cause issues in terms of salt concentrations; among other things. I read that you don't have time to water twice and I totally get it; time is a commodity we're all short on. If you have the funds (>$100), a simple drip system is quite easy to set up and it will allow you the ability to water multiple times a day. Also, don't be afraid to let your pH swing a bit...in other words, pH at 5.8, but if it swings to 6.1, don't sweat it..the swing allows for thorough nutrient uptake. FYI...the 5.5 pH is going to cause you issues with Mg uptake, so try to dial your pH in a smidge "5.8" From all you've posted: the plant is plenty green (underfeeding doesn't appear the issue). If it were me, aside from dialing in my pH a little better and keeping an eye on the overall plant's reaction to your decreased nutrient schedule, check at the end of the day or just before you water in the morning and see if your coco seems dried out or super light. If it is, I would try to come up with a way to keep it consistently moist, and see how your plant reacts. Whatever you do, don't knee jerk your way into a problem. Slow and steady wins this race. Good luck.
I can't comment on the fact that you're growing an Auto...I don't run them.
I can't comment on your feed, because I don't use it.
What I can tell you is, sometimes, when growing in coco, if the plant dries out too much between feeds, it can cause issues in terms of salt concentrations; among other things. I read that you don't have time to water twice and I totally get it; time is a commodity we're all short on. If you have the funds (>$100), a simple drip system is quite easy to set up and it will allow you the ability to water multiple times a day. Also, don't be afraid to let your pH swing a bit...in other words, pH at 5.8, but if it swings to 6.1, don't sweat it..the swing allows for thorough nutrient uptake. FYI...the 5.5 pH is going to cause you issues with Mg uptake, so try to dial your pH in a smidge "5.8" From all you've posted: the plant is plenty green (underfeeding doesn't appear the issue). If it were me, aside from dialing in my pH a little better and keeping an eye on the overall plant's reaction to your decreased nutrient schedule, check at the end of the day or just before you water in the morning and see if your coco seems dried out or super light. If it is, I would try to come up with a way to keep it consistently moist, and see how your plant reacts. Whatever you do, don't knee jerk your way into a problem. Slow and steady wins this race. Good luck.