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Marijuana seedlings1/28/2024 ![]() With this in mind - here are three steps to quickly find the ideal grow light height without an expensive light meter. As you can imagine, each of these grow light systems will have optimal, yet different, heights in the grow room. Alternatively, CFLs are low-watt and ideal for small grow rooms. In other words, HID systems pack a massive punch of lumens that are powerful at a distance. Remember, HID means high-intensity discharge. Depending on the grow light, there will be a difference in the overall height, such as HIDs and CFLs. Instead, HIDs, LEDs, and CFL-based grow lights play a crucial role within indoor cannabis gardens worldwide. However, this doesn’t mean one grow light is better than another. How to Find The Best Height For Grow Light Systems in Three Easy StepsĪlthough LED systems are growing in popularity, HID systems, such as HPS or MH, are still preferred by cannabis cultivators worldwide. If you place your lights too close to your cannabis plants, they could end up looking like this. Now that you understand the negative and positive implications of the grow light’s height - let’s move on and discuss how to find the best height for your indoor marijuana garden. On the flip side - finding the perfect height for your grow lights will: Produce dense flowers and short internodesĪs you can, there are several reasons why the height of your indoor grow lights matters.Īside from cannabis-related problems, inadequate height will also throw your cannabis garden into disarray, primarily by:.If your grow lights are too far or close to the plant canopy, several problems may occur, such as:Īlternatively, the right grow light height is known to: In other words, cannabis growers must continuously find the perfect balance between grow lights and the plant canopy for healthy results. Instead, cannabis cultivators must stay on-guard to adjust the height of their grow lights when necessary. From the seedling stage to the explosive growth of the pre-flowering phase - there’s never a fixed grow light height that cultivators can rely on. When discussing lighting issues with indoor cannabis growers, the number one question is always: What is the best height between grow light and plant canopy?Īs you know or will come to find out, cannabis plants are continually growing. I hope this answers your question and that your seedlings bounce back soon.Why You Need to Adjust the Height of Your Grow Light System When Growing Marijuana However, it would still be worth checking these other potential causes to make sure everything else is on point. I believe your issue stems from your original grow light which, in my opinion, was underpowered. Other reasons for leggy seedlings include temperatures that are above the desired range, overcrowded seedlings, or, in rare cases, lack of nutrients in the medium. Only try this method if the seedings have produced their first set of " true leaves" (the ones that look like cannabis leaves). If the lighting is adequate, the seedlings will continue to develop in a more compact manner. Once the lighting issue is corrected it is possible to carefully, and I mean carefully, transplant the seedlings into a deeper container so you can bury the majority of the leggy stem and allow the top portion of the seedling at the base of the soil. Other Potential Causes for Leggy Seedlings Ideally, cannabis seedlings would receive 20-40 watts per square foot of space. These systems will have the wattage and spectrum needed to beef up your seedlings and to grow cannabis full-term. However, if you plan on continuing the hobby of indoor cannabis cultivation you may want to invest into a flourescent or LED light system designed specifically for plant growth. Hopefully, the change you made can save your seedlings. That being said, four lights will be better than one and your new system should outperform your old grow light. Unfortunately, the grow lights you are describing (that screw into a regular base socket) are not typically powerful enough for growing cannabis. When germinating, the cannabis seedlings do not need light but after sprouting they need adequate light to grow properly. From your description I would guess you did not have adequate lighting for your little ones when they sprouted.
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