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When you grow cannabis indoor, it is considered beneficial, to have lights turned on up to 24h / day, during the "grow" phase. While this would prevent blooming, it is beneficial for building plant material.

When you grow spices and herbs, such as rosmary, savory, thymian, parsley etc., wouldn't it be beneficial to have the lights on 24h / day? Or do they need some dark time?

I have them in a room, which receives some indirect sun light. In addition, I have some grow lights on top of them, which are on for about 14h per day, during the day.

My idea is, to increase the lighting time to 24h / day and make use of the much cheaper night electricity price by either artificially lighting only during the night or artificially lighting 24h.

Would this be a good idea or do herbs and spices definitely need dark time?

user1721135
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Sorry, 24 hrs/day is TOO MUCH. You start out with 18/6 vegetative growth using BLUE LIGHT. When it is time to push the reproductive growth you switch to RED LIGHT and 12/12. Religious 12/12. No light peeks in while in this phase.

PH needs to be very neutral, real close to 7 or a bit above.

Fertilizer has to be low in nitrogen. Lower in respect to Phosphorous and Potassium or you won't get much bud.

All plants have been evolved with day and night cycles. NEVER 24/7 light. Photosynthetic factories need to 'reset' at night.

The BEST book and information is in Jorge Cervantes' Cannabis Encyclopedia! I use this for ALL plants. Cannabis is creating gardeners! The detail in this book is priceless if you are growing!!

Another tip: I purchased Spider Mite Predators this year. WOW. Pull up a chair and watch these guys decimate the Spider mite population AND eggs. It is like watching Game of Thrones in battle!

Another tip: Keep those fans blowing 24/7!

Another tip: Keep your smoking friends away from your plants. All plants. Tobacco Mosaic Virus is a big big deal for marijuana and Solanaceae or the tomato family; tomatoes, eggplant, potatoes, peppers. That virus is on their hands and their breath! If they want to visit your grow room or green house or garden, have them wash their hands thoroughly with soap, put a surgical mask on them. That should impress them! Grins! Get that book NOW. You will be humbled and taught how to grow anything properly. Jorge Cervantes Cannabis Encyclopedia

stormy
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