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Grow Journal #3 Back for more! 4-30-18

Iam am not monitoring ec/ppm. I learned this in a year bigger the plant more nutes she can handle. And the manufacturers schedule for drain to waste online is usually decent would not post something that would kill your plants. I flushed because my nute watering schedule got a little messed up so I figured some good ph water to push some of the left over salts out never a bad thing. I can tell you my timing was perfect they loved the flush and I just did a full line nute water they leaves we’re growing vertically. 😃 I do wanna pick up a real ph/ppm meter been looking more towards the meters with probes as the most effective and accurate meter. I have 2 cheapies from amazon but once I learned what my water ph was. A little over 3/4 of ml usually of ph down brings me in perfect range.
 
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Ahhh snapping branches you can’t make me do it. Lol I actually super crop my plants right in half about the 3ft mark then wait for them to get back there.
 
Lst, never hurts or slows done your growth, if you are careful.
But supercropping , is called high stress training , and yes it can slow down growth.
The main thing is keeping your canopy even and flat, and that's super easy to do with low stress training - lst.
Gook luck with your plants.
 
Thank was hoping to get to grow store today but timing won’t work so I will look at them and make a plan today so I can be ready when I grab it Sunday.
 
So I found something interesting researching the hlg 550 after seeing it mentioned in a post.
DANGERDAN correct me if I’m wrong but ppf is a more accurate measurement of led lights over par value. I see a lot of company’s on amazon posting the par graph with the footprint over a 4x4 space. At 1 foot from center most of the lights fall under 200-50 par. I have found a chart showing par then another chart showing ppf you can see that the ppf is a lot less than the par value per foot from center. So this is for a good light with a high par value I wonder what the 500 @ 18”-36” and less par values. Will be in ppf.
 

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I think the girls are signing in the choir. They are happy and so am i. Had to post this! =D
 

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Both those maps are in PPFD. PPF is a single measurement which is the total output capacity of a light source in a single figure. This is done with a expensive peice of equipment such as an integrating sphere. PAR is not a measurement system but a parameter for which measurement systems like photon counting systems can apply. The misuse of the word as a measurement system is an error. The problem with PPFD maps is that they are not all performed under the same conditions. If different heights are used there is unreliable comparisons. If different measurement points are used, there is unreliable comparisons. When calculating and comparing PPFD averages, every measurement paramter must be identicle otherwise there will be unreliable comparisons.
 
That is exactly why the rep for sunlight supply co said when I asked for ppf footprint map. They said the same thing the conditions would have to exact to get the same results as the foot print map.

So if the manufacturer can put the ppf on the box they have some pretty extensive testing equipment to research there lights to be able to know that type of information.
 
I do not understand how both are in ppf when the numbers are different and they specify par and ppf but the measure both in umols why is this?
 
Im glad that some store reps provide good advice. Yes if the manufacturers provide PPF measurements, they likely have a high quality product.
 
DANGERDAN is this statement true? Sorry I love asking questions to information I don’t know. I could talk about growing lights etc. for hours.

All factors need to be used in combination to select the most appropriate systems based on your cultivation and business goals, and the take home message is that PPF, PPFD, and photon efficiency are the proper metrics used by scientists and industry leading horticulture lighting companies. If a company does not provide you with the correct metrics used for horticulture lighting, they should not be selling horticulture lighting systems, and you will not be able to verify the true efficacy of their system
 
Layman’s terms if a company does no supply or know the ppf and ppfd since it requires advanced equipment to gain this information about he light. if they are not supplying this information they should not be in the horticulture industry and also probably not doing development and research to build there lights.
 
One is for a open space with no reflections, the other is with a tent with reflections. Another variable in which manufactures can use to cheat with.
 
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