There are a lot of comparisons of LED and HID lights for growing plants. Most use watts for the comparisons of such things like taut efficiency and heat vs. light, but I would like to see a comparison using photosynthetic photon flux density (PPFD) as units of measure. For example, if plants do well with 300 umol/m2/s from an HID light (knowing that only a portion of the light spectrum from an HID light is efficiently used by plants, even if it falls within photosynthetically active radiation—400 to 700 nm), what is a comparable number of umol/m2/s from LEDs that will produce similar growth results? This is assuming the LEDs are emitting wavelengths efficiently used by plants—roughly 400 to 500 nm and 600 to 700 nm on a 1:7 ratio of the two wavelength regions. I know there are many issues here, but please assume I have a reasonable understanding of them except this one. I haven't found anything on this yet. Hoping for an answer.
Best regards,
Dave
Hi,
I’m a woman trying to be a thoughtful wife, but I don't really know anything about indoor or outdoor process. My husband and I live where it snows and is cold more than half the year. He is currently growing indoors but wants to move outdoors with a greenhouse. My question is: what kind of system can I get him so it can go inside and outside without a drop in performance and fruit quality, using the same system? He prefers a more natural light system and natural feeding, but we also need to watch the bill side as well! Please help!
Leticia
As a grower, I always want optimal pest control and nutrient balance in my garden. Is it possible to use companion planting to help with this? In particular, I’m interested in companion plants for my upcoming crops of tomatoes and culinary herbs like basil, cilantro and dill.
Thank you,
JD
