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Grow QuestionsLED light distance

LED light distance

Frog35started grow question 2 years ago

Hey guys I'm kind of new to growing only been doing it for a little over a year. My girls grow really well they just don't get very tall I'm thinking it's because my lights are too close. Is this correct? Distance is 9 inches above canopy in week 6 growing critical 2.0 autos.

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Week 6

Setup. Lighting

Sciolistic_Steveanswered grow question 2 years ago

so many factors.. optimally, your light is well-sized for the area you try to cover and therefor just let geometry dictate best height... based on evenness of coverage without sacrificing too much of course. weighted average of light intensity should not suffer too much to improve corners/edges etc... like others said, there's genetic variety.. but you can assess how much light you give by the length of internodes... the distance between 2 growth nodes is directly impacted by the intensity of light provided over time... if tightly packed, you probably gave too much lihgt. if it is short with normal spacing you can assume it's just genetics + resulting growth rate your environment provides. So, if the nodes are not stacked on top of each other, your light did not cause the short-statured plants. Which does not look to be the case from pictures that are a bit too small to see for certainty. So, some other factors ar at play... thos elook to be 50-100w quantum boards? so, the 100w can definitely grow an autoflower out properly, a 50-w might end up with some unrealized growth left on the table. The fertilizer you use and how you fed could impact rate of growth too. autoflowers and silly stuff like solo cup grows quickly show how far off from optimal our choices and beliefs are... e.g. anything less than 30-50g from a solo cup is a solid correlation to poor feeding practices and unwillingness to accept that we might be wrong about a few things lol. anyway, make sure you are providing enough DLI.. use the specs from you rlight, assuming they didn't lie their asses off on the metrics.

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Frog35answered grow question 2 years ago

Thanks for all the great info bro

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40Pluganswered grow question 2 years ago

In order for your plants to grow bigger, it is important to pay attention to this in the vegetative phase. About two weeks into flowering, the plant gives energy to the buds and not to the side branches themselves. With autos it's important to put the seed directly into the final pot. Automatics will start flowering after about 4-5 weeks. 7L pots and you will get a small compact plant, at 11L it will be much bigger. Your light must have enough distance but also not too much. In my experience automatics are unpredictable. It always depends on the plant or genetic itself. I had already tiny but also sometimes almost 2 meters Automatics. To have more control over the growth, I recommend you to use feminized photosynthetic seeds. However, these usually take much longer. I hope I could help you further

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m0useanswered grow question 2 years ago

Lotta good information here. Can't say I have ever heard misinformation from Ezzjaybruh or Creepysteve. I would say 9" is to close but that's just a guesstimate figure based off of most 100W lights. FYI: We will not be notified of any reply or tag [@] in the questions part of the website, if you need to reach out with other information use your DM "direct mailbox" in the bottom right hand corner of the page. it looks like a little paper airplane icon. Good Luck!

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GrowingGrannieanswered grow question 2 years ago

Some autos just don't get very tall so it may or may not be your lights.... The time when you want to really pay attention to the distance is when they're in veg and in the first week or so of flower.... that's when raising your lights can encourage them to get taller ... but don't overdo it... you'll just have to play around with them on each grow (seriously!) and figure out what the sweet spot is for the particular strain you're growing.... For example, in the first couple of weeks, if the nodes are very close together, pull your lights up - make her stretch for it... conversely, if they're looking pretty leggy and there's huge distances between the nodes, pull the lights closer... The intuition will come... just keep on growing, you're doing really well! Cheers!

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GrowingTrannyanswered grow question 2 years ago

High, when a plant stays small with the internodes close too each other it is a good thing. The plant only start too stretch when she is searching for more light with a higher intensity. Usually you hang a 100 or 200 watts led between 30-40 cm from the top of the plant. But I used 100 watts Cob leds that were too strong and hot for this distance and I used a 200 watts Spectrabox led that could go even closer without causing heat or light stress. So instead of asking people with different lamps and opinions it is better to google the manual from the brand and your model led lamp and see what the manufactory does advice in their manual. They did the testing and they know what distance should be the best way to go. If you can not find the manual just email them. Happy and healthy 2023

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Ezzjaybruhanswered grow question 2 years ago

I meant to also say - after you have an understanding of those things I mentioned reading up on .. then you find out your lights specific umols/sec/m2 at specific heights. Your user manual or the site you bought from should show these numbers at different heights. Then you can calculate the DLI your plant is getting approximately and adjust accordingly

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Ezzjaybruhanswered grow question 2 years ago

Depends on things but too close of light will do that. I’d raise it up personally.. do some reading on lights and photons and PPFD and then DLI (daily light integral) These are autos and the ruderalis genetics used for the autoflowering gene causes other traits of ruderalis - one being short and stout plants.

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