Broad mites cause leaves to almost look shiny
*What is an LED “T5” grow light? It’s basically an LED grow light in the shape of a traditional T5. The term “T5″ is based on the width of the fluorescent bulb (5/8”) so labeling an LED grow light as a “T5” is just a marketing gimmick. From what I’ve seen, some brands work well, others not so much, just like regular LED grow lights.
4.) Nutrient Deficiencies
The most common cause of unhappy roots is overwatering, especially for seedlings and young plants. Overwatering is typically the result of giving too much water at a time, or watering too often.
Cannabis plants enjoy a warm sunny day. Not too dry, not too humid. Similar to humans, actually. Certain strains are more resistant to an extreme environment, but plants grow best in moderate humidity and warm-but-not-hot air. A good temperature range is warmer than 70°F (21°C) at night and around 79°F (26°C) during the day. Humidity around 50% is perfect.
Now that you know what may be causing the problem, get the solution. Follow these principles and your plants will be growing inches a day!
For photoperiod plants, timing is everything. Photoperiod cannabis plants take their cue from Mother Nature (or more specifically the number of uninterrupted hours of darkness) to start flowering. As fall sets in and hours of darkness hit twelve per night, the plant will be triggered into its flowering stage.
Phases of growth and timing for outdoor growers
Like any farmer or gardener, cannabis farmers and gardeners typically get their plants in the ground as soon as the weather is warm enough and the days are long enough.
Why do growers plant and harvest cannabis at specific times of the year?
If you aren’t working with exclusively female plants, you’ll need to get rid of the males before they have a chance to pollinate the females (and wreck your harvest). “Even feminized seeds can have up to 10% males in the mix so it’s important to inspect your plants every day as they start to show their sex. Also important to note is that a stressed female plant can produce male branches or ‘hermaphrodites’, so even if you know she’s a girl, you have to check daily,” advised Sara Rotman, a veteran grower and founder of Wellfounded Botanicals.
Growing outdoors is fun and can be cheaper, both said, but can lead to an inferior product for your investment of time and energy, especially if you don't have a fast-maturing strain.
"We really encourage growers to take some time and do some homework on what it takes to grow and then you won't let yourself down," Kerr said.
2. Growing outside
Many rookies dive right in to hydroponic growing, he said, then discover just that and switch back to growing in soil.
Hanging reflective material or fabric or using a growing tent (they range from a few hundred dollars to more than $1,000) will help control this, Kerr and Harnden say.
Seed sales not 'strong'
Needless to say, growers will want to handle those seeds with care — Kerr and Harnden described some of the pitfalls for those who are new to the process.