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Where do you see claw leaves? because I don't see any Thank you for your comment trying to help

foliar treatments with epson salts.

@Rocket Soul , If you put the circadian cycle of plants into Google, you should get a lot of articles. I am Spanish, so if I put it in Spanish I get many articles, I wouldn't know how to tell you in English. But I leave you some links to those articles in which I learn about these studies...

It is a very widespread myth. The use of far red 10 min. before the day/night photoperiod change has no influence. This is regulated by the circadian cycle of plants. There are many studies on that and they did not depend on distant reds to know when it was time for sunrise or sunset.

It seems that they are recovering, the new shoots have a good color and the leaves with spots are not getting worse. I did some foliar applications of Epson salts.

thanks bro we will see how they evolve

Hello, the new leaves are losing their color on top. what do you think of magnesium/sulfur or other nutrient deficiency? Or too much light?? i use supersoil and 3 gallon pots Max 24 / Min 19 grados Celsius Max 71% / min 43% the space is 60x60 cm 190w panel distance 55 cm 500/600 ppfd with...

The spectrum is not a different topic, you can put 1800 PPFD of a green spectrum and that study would not tell me anything, the same as that study that uses purple LEDs with blue/red and without using the other bands of the spectrum, especially green/yellow and infrared that affect the leaves more.

Do you think the spectrum used in this study is a good one?

The real power will be +/- 660w and the other +/- 60w remaining will be the losses generated by the ballast.

Con HPS, las plantas pueden aceptar una mayor densidad de fotones que con LED sin mostrar deficiencias ni signos de estrés en las hojas. Para mí el problema está en el espectro LED (especialmente la falta de IR) y la relación de los colores entre sí. Los científicos utilizan el NDVI para...

Basically you have the option of giving more power and they reach 720w. All ballasts have the option of super lumens and give more power

yes

You are absolutely right, the spectrum changes depending on the time I had sent a pdf with spectral measurements from 8:00 am to 12:00 am and thus see the differences in the spectra, but to put a phrase in Spanish they have deleted it. If you are interested send me an MD.

You are absolutely right, the problem is that I have not tried it, I have only grown with LEDs and HPS, so I cannot recommend something that I have not tried hehe

Regarding the use of IR in plants, for me with an example it is simple to understand the importance of infrared. Let's see a sunny day lying on the towel on the beach with the sun shining, you will start to sweat, you will end up tanned and sweltering as hell. If you go into a UV ray booth...

The choice of your light does not correspond to you, it corresponds to the temperature where you want to place your crop. If it's a cold place, HPS DEFINITELY. If instead you grow in a hot place LED.

The use of heating reduces cultivation efficiency. If you don't have a suitable temperature, use sodium, lec or other lighting that raises the temperature and provides light. Do not use heaters that only provide heat.

@sfw1960 With these two spectrums you can harvest flowers, but the plants will be morphologically different. Plants have many photoreceptors, these are called antenna pigments. That is why it can be grown under different spectrums.