OneHitDone
Well-Known Member
Why not try some of the uni-slabs under the block or grow cubes?
All COB Users - Lettuce Grow Challenge!!
- Thread starter OneHitDone
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muleface
Well-Known Member
i like the idea of filling it out with grow cubes. maybe throw some clay balls on top so the rock wool doesn't get all gross. thanks
Serva
Well-Known Member
Hello guys! Could need your help...
I‘ve got a greenhouse, but during the winter I‘ve got too less light in it. It‘s all about salad and asia stuff, so only vegetable which is used to cold tempratures (50-60F). But how much light would I need to add, to improve the growth? The sun will shine in the greenhouse for around 8 hours a day. So I want to add some light in the morning and in the evening. Maybe 4 hours to start before the sun, and 4 hours when the sun is gone. Or should I adjust to a 18h day, or use less hours of aritifical light? And the most important is, how much light I need to at per square foot? It seems that 1500lm / sqft should be enough for growing salad, but won‘t it be too much as additional light? I am thinking about getting some ip65 led strips, or are there better options to choose? Thanks for your suggestions and help!
The place here on my right is free
I want @Randomblame coming to me!
Could‘t find a better translation
Maybe you know something about my questions?
I‘ve got a greenhouse, but during the winter I‘ve got too less light in it. It‘s all about salad and asia stuff, so only vegetable which is used to cold tempratures (50-60F). But how much light would I need to add, to improve the growth? The sun will shine in the greenhouse for around 8 hours a day. So I want to add some light in the morning and in the evening. Maybe 4 hours to start before the sun, and 4 hours when the sun is gone. Or should I adjust to a 18h day, or use less hours of aritifical light? And the most important is, how much light I need to at per square foot? It seems that 1500lm / sqft should be enough for growing salad, but won‘t it be too much as additional light? I am thinking about getting some ip65 led strips, or are there better options to choose? Thanks for your suggestions and help!
The place here on my right is free
I want @Randomblame coming to me!
Could‘t find a better translation
Maybe you know something about my questions?
Last edited:
OneHitDone
Well-Known Member
A good place to start would be the lighting section of this lettuce production paperHello guys! Could need your help...
I‘ve got a greenhouse, but during the winter I‘ve got too less light in it. It‘s all about salad and asia stuff, so only vegetable which is used to cold tempratures (50-60F). But how much light would I need to add, to improve the growth? The sun will shine in the greenhouse for around 8 hours a day. So I want to add some light in the morning and in the evening. Maybe 4 hours to start before the sun, and 4 hours when the sun is gone. Or should I adjust to a 18h day, or use less hours of aritifical light? And the most important is, how much light I need to at per square foot? It seems that 1500lm / sqft should be enough for growing salad, but won‘t it be too much as additional light? I am thinking about getting some ip65 led strips, or are there better options to choose? Thanks for your suggestions and help!
The place here on my right is free
I want @Randomblame coming to me!
Could‘t find a better translation
http://www.cornellcea.com/attachments/Cornell CEA Lettuce Handbook .pdf
muleface
Well-Known Member
Hello guys! Could need your help...
I‘ve got a greenhouse, but during the winter I‘ve got too less light in it. It‘s all about salad and asia stuff, so only vegetable which is used to cold tempratures (50-60F). But how much light would I need to add, to improve the growth? The sun will shine in the greenhouse for around 8 hours a day. So I want to add some light in the morning and in the evening. Maybe 4 hours to start before the sun, and 4 hours when the sun is gone. Or should I adjust to a 18h day, or use less hours of aritifical light? And the most important is, how much light I need to at per square foot? It seems that 1500lm / sqft should be enough for growing salad, but won‘t it be too much as additional light? I am thinking about getting some ip65 led strips, or are there better options to choose? Thanks for your suggestions and help!
The place here on my right is free
I want @Randomblame coming to me!
Could‘t find a better translation
I used low end 6000k 22w cheap integrated led strips. They worked well were cheap. how big of a foot print are you running?
eyderbuddy
Well-Known Member
LOL, probably!
Every photon from supplemental sources will greatly benefit your plants up to a certain extent. I recommend you just start adding supplemental light fixtures slowly and see how things change gradually.
In order help you light your greenhouse we would need data about the amount of light you receive on a daily basis, your location, and then go from there. Maybe try figuring out your grow zone, how much irradiation you get there, the model of the lights you're planning to use. All of that would be helpful.
thetr33man
Well-Known Member
Got some deficiency showing on older leaves. Thought it was MG so I increased epsom salts to 3g / gallon and also adding 3ml/gallon magical, tap water (@ 320ppm), along with floranova nutes. Maybe need more calmag?
![20180115_090208[1].jpg](/data/attachments/3174/3174312-99581200adec7afa67bdebebd6bcd9c2.jpg)
OneHitDone
Well-Known Member
I would guess deficient by lock out.
That sounds like way too many nutrients to me
thetr33man
Well-Known Member
Maybe, Im adding 7.5 ml of floranova bloom, 3 grams epsom, 3 ml magical and 1.5ml of sulfuric acid to bring PH down to about 6. I havent tested PPM but ph shouldnt be the issue. I was using 5ml of FN-B but saw some signs of nitrogen deficiency, those seem to have corrected but some of the older leaves dont look right. Maybe I should back off the epsom and increase cal-mag a bit?
OneHitDone
Well-Known Member
You could sit down and work out the elemental ppm's and really get a picture of what is going on.
My basic assessment would be:
1 - at 320ppm your water has a lot of calcium/magnesium already
2 - you should be using Flora Nova Grow rather than Bloom for tomato's (or possibly even better Flora Series 3 part with Hard Water Micro)
3 - CaliMagic prides itself on being the "lower N calmag" so I would not be the best choice for N boost. Botanicare's is Mag Nitrate / Cal Nitrate so would possibly be better but still I think you have too much calcium and magnesium in your base water to start.
Want simplicity? Grab a bottle of Ionic Grow for Hard Water and watch the magic happen
eyderbuddy
Well-Known Member
I've noticed the hard way that not every problem is a deficiency. Maybe try cutting back a little? Try to normalize your nutrient system and find an equilibrium that you can know it works for sure, then grow from there!
muleface
Well-Known Member
Question, how are you mixing your nutrients into your reservoir? are you mixing them together then adding them to your reservoir, or do you measure them out individually and add them? This matters, if you mix different nutrients together before you put them in your reservoir they will cancel some of their elements out.
thetr33man
Well-Known Member
Ive been adding the floranova then the epsom then the calmag and finally the sulfuric to bring ph down a bit. These got into the bucket and it is mixed between each addition.
muleface
Well-Known Member
Try using a larger volume of water when mixing.
why not white vinegar vs. sulfuric ?
thetr33man
Well-Known Member
I dunno, sulfuric is cheap and seems to work fine. Battery acid from napa or wherever dilutes to a lot of ph down for just a few bucks.