Let’s take a look at over-lighting and consider available remedies.
Light burn may also cause loose and airy buds. That’s because the excess light causes nutrient deficiencies as plants struggle to overcome their heat and thirst.
Fortunately, you don’t have to wait for these symptoms to emerge to know whether greenhouse lighting is too strong. One simple test asks the grower to put a hand, palm down, at the top of the plant. In 10 to 15 seconds, you’ll feel how much heat the plant is getting. If it is too hot for comfort on the back of your hand, that’s probably more lighting than the plant requires.
Too much light can harm cannabis plants, and a thoughtful grower needs to be strategic about the placement and strength of light sources in a greenhouse environment.
By combining close firsthand observation with remote monitoring tools, growers can keep light burn in check and make rapid adjustments any time plants seem to be getting more light than is good for them. By being proactive and persistent, most growers can easily manage greenhouse lighting for high yields over time.
Distance matters when it comes to lighting. Plant burn often comes about when plants are growing too close to the main source of light and heat. Depending on your greenhouse configuration, it may be relatively easy to raise light fixtures or otherwise distance them from plants.
Growers also can adjust the strength of lighting. Experts recommend 100 watts of light for a 2 foot by 2 foot grow area, up to 1,000 watts for an 8 foot by 8 foot area. Most growers will experiment as they seek the lighting levels that promote the best and fastest growth without compromising plant health.
Cannabis plants will show a number of key signs when they’re getting too much light.
Although too much light can impede plant growth, it’s also a fairly easy problem to fix. There are a couple of common methods for remediating a too-bright greenhouse.
Read on to learn about light burn in corps and what remedies exist to fix and prevent this common growing issue.