Usually the only time we hear the word flushing is when it comes to a toilet, so what exactly does it mean when growing plants?
Basically, water is a solvent and will break down and dissolve minerals of salt. As plant nutrients are salt based, especially hydroponic nutrients over time a build up of undissolved salts can occur in the growing medium and around the root zone. If a root zone is unable to buffer the remaining minerals in the growing medium, this may lead to a lock out, nutrient deficiency or toxicity. By Stoney Tark.
Flushing plants simply means to supply only water for a certain time frame to act as a solvent and to break down any remaining undissolved salts. Enzymes will help speed this process up as their role is to actively break down organic substrate into smaller bite sized pieces the roots can utilise. The way that plants absorb nutrients from the growing medium to the root hairs is through the fine film of water that come in contact with the root hairs and growing substrate, so the plants will always be able to access nutrients if they require them.
Why Is Flushing Necessary?
Flushing Cannabis plants is necessary for a number of reasons and they cover both the growing experience and the overall quality of the harvested flower. Commercially in coffee shops, social clubs and dispensaries, smokers who go to these places as part of their normal culture will expect the flowers to be well grown, correctly flushed and trimmed to as close to perfection as can get.
Any of the outlets that supply Cannabis to connoisseurs and Cannabis enthusiasts would soon go out of business if they provided flower that was harsh on the lungs and throat, joints that constantly needed relighting and a charcoal black ash that falls of in lumps. Flushing is part and parcel of growing top quality Cannabis, so those who skip this part of the grow cycle are usually short sighted or are simply number driven and are only focused on the largest harvest without consideration to the taste and overall experience to the end user.
Well Flushed Characteristics
Well flushed Cannabis when smoking will supremely smooth on both inhale and exhale, accompanied by a lip licking after taste, that is long lasting an clear. The joint will burn with ease and at an even speed meaning there will be no side burning of the paper. When tapping the joint in the ashtray, the ash will be very soft and seem lightweight as it falls very similar to cigarette ash.
You should not need to light the joint more than once and the clean, oily flower will burn all the way down the end without being nursed from a lighter or constantly blowing the ember. The actual ash will be so clean you should be able to drop some ash in the palm of your hand and once rubbing it in to the skin, there will be zero residue and you can simply blow the soft ash away.
• Soft light grey ash
• Evenly burning joint
• No need to relight joint
• No coughing sensation at all
• Long lasting flavours on both inhale
and exhale
• The aroma of a burning joint will smell very pleasant
• Best possible experience and feeling
• All excess salts removed
Poorly Flushed Characteristics
The only way you can really tell if a flower has not been correctly flushed is until you smoke it, and there are a number of red flags to look out for. Firstly the joint will almost instantly side burn as the ember struggles to burn correctly causing the joint to feel tight. The flavour will be very bland and almost spicey hot on the roof of the mouth and the aroma will not smell like someone is burning some high grade.
Tapping the ash can cause the ember to fall off completely with a loose bit of tobacco, again down to the ember struggling to burn together evenly. The colour of the top of the joint will be a dark, charcoal black and when rubbing the ash in your hands, it will for sure leave a black residue that needs cleaning off.
• Lack of taste on inhale and exhale
• Joint will keep going out
• Joint pulls very tight
• Black ash that burns uneven
• A harsh tickling sensation on the lungs
• Coughing and spicy flavour
• Charcoal residue on skin from the ash
• Foul smell when burning a pure joint
• Headaches and migraines after smoking
• Excess salts still remain