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However, slight patience is required when conducting the float test, as results are not immediately apparent. You’ll have to wait for approximately 1–2 hours before confirming the results. Some good-quality seeds will need adequate time to absorb enough water for them to sink. Use this time to go water the garden and get some much needed pruning done. Upon your return, any seeds that remain on the surface are most likely not viable and won’t be worth further time and effort.
If you are still unsure about the quality of your seeds after analysing their appearance and toughness, it’s time to put your lab coat and goggles on. Well, not quite. This test is extremely easy and only has two possible outcomes. Fill up a drinking glass or glass jar with water (preferably spring or distilled) and place your seeds on the surface.
Remember, just like animals and other living things, cannabis seeds are biologically different from one another (even if they are technically the same strain) and therefore will exhibit different physical characteristics. Don’t let these natural differences fool you into thinking that a larger, rounder, and darker seed (for example) is of better quality than a lighter, smaller, and more oval-shaped one.
Conducting The Float Test
A solid way to obtain great seeds is to find a reputable seed bank. These companies pride themselves of their breeding skills and make sure that their customers receive exactly what has been advertised. They have reputations to cater to, so delivering anything less would only harm their image.
Are your seeds light or dark in colour? Are they tough or do they turn to dust when you press them between your fingers? These are just some of the ways to tell if a seed is healthy and worth growing. Keep reading to learn more.
We hear this question all the time from clients and beginner growers, and the answer is a resounding no. There is simply no way to tell the sex of a cannabis seed just by looking at it.
Immature cannabis seeds, on the other hand, tend to be green and have a soft outer shell that breaks when any kind of pressure is applied to it.
The drawback can be that a quality grow light with COB LEDs is quite expensive compared to cheaper purple lights. Some grow light manufacturers combine several COB LEDs into one fixture, often equipping them with lenses and reflectors. There are also lights available that are comprised of only one single COB. These single-COB fixtures can be a good choice for larger growing spaces, as you can space a number of them evenly for light distribution across the entire area. Most growers use COB LEDs with a light spectrum that works both for vegging and flowering, but you can also find those with a spectrum (“colour temperature”) tuned specifically to vegging or flowering.
When you water cannabis plants, you’ll normally do so with an infusion of nutrients. In addition to watering less, your plants will also need less nutes than they would before. In addition to some nice savings on nutrients, the less-frequent watering and feeding schedule will also decrease nutrient buildup, so there’s a lower risk of nutrient lockout and plant deficiencies.
THE ADVANTAGES OF GROWING WITH LED LIGHTS
As soon as your seeds have sprouted, your soon-to-be cannabis plant will need light to grow. Compared to more mature plants, however, your seedling is much more sensitive to intense light. Because of that, you should be careful when starting out with strong LEDs.
These standard LED light fixtures were the first type available for growing, and today, they’re still widely available. These lights contain a lot, sometimes hundreds, of small to medium wattage LEDs (3–5 watts per single LED) in a compact fixture. Cannabis growers sometimes refer to these as “purple” lights, as they often comprise a mix of red and blue LEDs that combine to emit a purple hue. The biggest advantage of these standard LED lights is their price point. Most are manufactured overseas, and you can find them aplenty on eBay and other places online. A disadvantage is that their quality is often lacking; they can be less than reliable, and their light output is often lower than other types of LEDs, leading to lower yields. To remedy this, we’re now seeing standard LEDs begin to include COB LED lights or UV LEDs in addition to the red and blue, which can help with yield and bud quality.
COB means “chip on board”. A COB LED is made of many hundreds of tiny LEDs on one single small chip, as opposed to differently coloured LEDs spread over the entire fixture (as is the case above). COBs are among the most efficient LEDs. They produce a very intense white light that is similar to the natural light spectrum of the sun. One advantage of COBs is that they have good penetration into the plant canopy due to their intensity, resulting in a final yield approaching that of quality HID lamps. They also have a light spectrum that is optimal for healthy growth, and are very energy-efficient. The drawback can be that a quality grow light with COB LEDs is quite expensive compared to cheaper purple lights. Some grow light manufacturers combine several COB LEDs into one fixture, often equipping them with lenses and reflectors. There are also lights available that are comprised of only one single COB. These single-COB fixtures can be a good choice for larger growing spaces, as you can space a number of them evenly for light distribution across the entire area. Most growers use COB LEDs with a light spectrum that works both for vegging and flowering, but you can also find those with a spectrum (“colour temperature”) tuned specifically to vegging or flowering.