All COB Users - Lettuce Grow Challenge!!

[OneHitDone]

its coming along. Not sure how long until i'm suppose to harvest But I may wait another 2 weeks or so.

Just depends if your growing them to full size or want to munch on younger leaves.
You can harvest not, let them keep going, pluck a few leaves from a few and then again as needed or cut the tops and let then regrow (cut and come again?)
What varieties do you have going there?

 

[muleface]

Cimarron Romaine Lettuce
Red Romaine Lettuce
Ruby Leaf Lettuce
Merveille de Quatre Saisons Lettuce
Salad Bowl, Green - Leaf Lettuce
Buttercrunch Bibb Lettuce

i think there may be a couple more, however, i didn't label anything so i have no idea which ones are which.

 

[PicklesRus]

its coming along. Not sure how long until i'm suppose to harvest But I may wait another 2 weeks or so.

Do you have any idea how much PAR is under those lights in that configuration?
They worked out to $5 each right?

 

[pinner420]

Spoke with investors today. Looking at business plan for vertical warehouse.

 

[muleface]

id have to redo the numbers, but i have 28,4 foot 22 watt tubes @ 6500k. They were about $6 a piece. They have built in drivers and heat sinks. so, for 6 a pop its a pretty good deal. Right now when i put a lux meter under them, they are at about 25,000 lx, and that's just about anywhere i put the meter. If i pull the lattace work off the top they drop to about 21,000 lx.

 

[muleface]

Spoke with investors today. Looking at business plan for vertical warehouse.

is this for lettuce? I'm am kicking around that idea, but I first need to figure out if i can actually get it to grow without leaf burn.

 

[pinner420]

Ya I'm gonna test my 315 cmh vertical theory on a prototype. Should be fun.

 

[pinner420]

is this for lettuce? I'm am kicking around that idea, but I first need to figure out if i can actually get it to grow without leaf burn.

I'm sure your feeding regiment is in here but I'm to lazy to read the thread to find it.

 

[muleface]

I'm sure your feeding regiment is in here but I'm to lazy to read the thread to find it.

I can respect that! I am using:
https://hydro-gardens.com/product/tomato-formula-25lbs-bag-4-18-38/

with cal/mag I am using a it for both tomatoes and lettuce. They tomatoes have exploded with it, they flower like crazy and grow the same. I am running about 2 ec and 6 ph.

 

[pinner420]

Cut it to 1.0. 1.2..... leaf burn is guess not enough manganese...

 

[muleface]

so my water is already at about .5 or .6 out of tap. Id think if i only added .5 more in nutrients they would be malnourished.

 

[OneHitDone]

I'm dealing with tip burn central on my indoor nft too
I'm suspecting too high of light intensity as close as they are to the hood.
Have another batch sprouting and will test a significant ec reduction. I know they say low ec in summer when temps are high for lettuce.
I suspect they drink more rapidly at lower ec allowing the plant cells to move calcium to the growing tips more rapidly. But I could also be full of shit and way off base too lol

 

[pinner420]

so my water is already at about .5 or .6 out of tap. Id think if i only added .5 more in nutrients they would be malnourished.

Get ro filter stat....

 

[pinner420]

I'm dealing with tip burn central on my indoor nft too
I'm suspecting too high of light intensity as close as they are to the hood.
Have another batch sprouting and will test a significant ec reduction. I know they say low ec in summer when temps are high for lettuce.
I suspect they drink more rapidly at lower ec allowing the plant cells to move calcium to the growing tips more rapidly. But I could also be full of shit and way off base too lol

Ya especially when your feeding state of the art nutrients.

 

[muleface]

Get ro filter stat....

I was kicking around that idea, but i have a 110 gallon reservoir to fill. you have any suggestions on a filter? I was hoping there was something i could use where i could fill the tank then run a pump in it to filter the water. An RO filter to fill that much would be really expensive or take all day.

 

[OLD MOTHER SATIVA]

the aquaponic greens we have under an hps have tip burn..it sure ain't the ferts

 

[pinner420]

I was kicking around that idea, but i have a 110 gallon reservoir to fill. you have any suggestions on a filter? I was hoping there was something i could use where i could fill the tank then run a pump in it to filter the water. An RO filter to fill that much would be really expensive or take all day.

I'd make my decision close to what your shop is supporting and stocking parts for.

 

[OneHitDone]

the aquaponic greens we have under an hps have tip burn..it sure ain't the ferts

I have grown lettuce under hps with no tip burn. It has to do with Temps, Light Intensity, or nutrient strength / composition / concentration

 

[Patrick N.]

id have to redo the numbers, but i have 28,4 foot 22 watt tubes @ 6500k. They were about $6 a piece. They have built in drivers and heat sinks. so, for 6 a pop its a pretty good deal. Right now when i put a lux meter under them, they are at about 25,000 lx, and that's just about anywhere i put the meter. If i pull the lattace work off the top they drop to about 21,000 lx.

Hi guys. Newbie here. Muleface, where did you get your tubes for $6 each? The lowest price I've seen so far is $10/tube (ebay). Thanks so much.

 

[muleface]

I have grown lettuce under hps with no tip burn. It has to do with Temps, Light Intensity, or nutrient strength / composition / concentration

so pretty much every aspect of the grow, got it!