Thursday, October 29, 2015

Harvest Guide: Cutting, Trimming, Drying, Curing

"Marijuana will lose approximately 75 percent of its weight during drying due to water evaporating from plant matter. Buds dried too fast will be frail and may start to crumble. Keep humidity between 45 and 55 percent in your drying room to prevent this and to help keep aroma and flavor locked in. Buds are done drying and ready for curing when stems snap when bent rather than just folding over. Air exchanges during curing should occur every four or five hours with curing bins left open for 10 minutes at a time."
High Times:
If a grower can consistently examine trichomes and keep accurate time records from the start of the flowering photoperiod (12/12 light cycle), then it should be no problem for the grower to begin flushing out the grow medium in preparation for the harvest.

There are various methods by which even the most amateur grower can tell when buds are truly ripe for the picking. The simplest and quickest way to know is by examining the pistils, or long hairs, that cover the plant’s buds. At the onset of flowering, these pistils are white and stringy. But as the flowering period comes to an end, they begin to turn color, first from white to orange and then again to a dark red or brown. These color changes signify the maturation of the buds; however, the color and time frame may vary significantly across different varieties of cannabis.

As with pistils, trichomes also begin to change color as the buds mature. But in this scenario, a grower wants to harvest buds before they get too dark in color. Even a subtle amber hue in these glands could mean that cannabinoids have begun breaking down and decomposing, which means less potent pot. Using a magnifier between 50x-100x, advanced growers look for a creamy or milky white color in trichomes that tells them it’s time to harvest.

The Two-Step Flush
The last two weeks of flowering should be spent getting rid of any built-up nutrients in the growing medium, a process called leaching, or flushing. By removing all access to nutrients, the plant begins to consume its stored food reserves. These reserves are nasty compounds that we don't want in our smoke, such as sugars, starches and various other elements. Harvesting plants that still have these undesirable elements present will only result in a harsh smoke and terrible burnability.

Flushing should begin about 14 days before harvest by stopping all nutrients and using only pure water to feed the plants. By providing no nutrients, you force the plant to rely only on what is left in the growing medium to feed on. The actual act of flushing is achieved by over-irrigating the medium until the nutrients inside are dissolved and washed out the bottom of the container. The best way to do this is with a two-step flush technique. (The process is an easy one.)

 First, flood the grow medium with a heavy dose of water and wait a few minutes to allow all of the salts (nutrient buildup) to break down. Then add more water to chase out the first dose. By waiting a few minutes after adding the first dose of water, you're allowing enough time for the water to dissolve the salts. As salts decompose, they can be effectively flushed out by the second dose. Traditional leaching usually employs only the first flush of water, which isn’t always adequate for complete dissolution.

A few days after flushing, you should notice signs of nitrogen deficiency. The leaves will go from dark to light green, eventually turning completely yellow. Another sign is a reddening of the leaf stems, starting at the center of the leaf where the blades come together.

Test your flush by snapping off a leaf and tasting the juice that flows from the stem. If the taste is bitter, there's still plenty of food in the plant's system. When the juices are clean and taste like pure water, the plant is clean enough for harvest. The bitterness is from nutrients and other chemicals that you definitely do not want in your smoke.


Dry Air = More Resin
 One final flush should occur a day or two before harvesting, with the final 24 hours of the garden’s life being spent in relative dryness. This last deluge should be done with fresh water and can be a single or a two-step flush, depending on how much fertilizer was applied previous to the final two weeks of flowering. This will be the final watering your plants ever get. In doing this, you help ensure that the plants will begin to slowly dehydrate as you approach harvest, which in turn will aid the plants in their final hours of resin production.

Some gardeners even like to allow their medium to go bone-dry before harvesting. The idea is that resin production seems to skyrocket if the medium is allowed to dry before harvesting, but this isn't due to dry medium – it's due to dry air.

When the relative humidity in the garden is low, your resin production will increase. This is a natural response cannabis has to dry air, an attempt to protect itself from hot, dry conditions. Marijuana resin actually has one of the highest UV-resistance ratings in the plant kingdom. The resin reflects light, preventing the buds from getting sunburn. (This is also why it's so easy for helicopters to spot marijuana from the sky; it glows when seen through UV-sensitive equipment.)

Lowering the humidity in the room on that last night before harvest morning will ensure increased resin production, without having to let the medium go bone-dry first. Additionally, some growers like to subject their gardens to prolonged dark periods of up to 24 hours just before cutting, claiming they notice spikes in resin production. This is all right as the low humidity will cut down on light uptake anyway, plus it helps to make sure liquid foods within the plants drain down to the root zone.

What Time of Day to Harvest?
Timing the harvest is paramount to the final quality. Harvest your precious buds in the dark, just before the lights normally come on. If possible, do not allow the plants to see direct light as long as their roots are attached. Direct light on a plant will draw up stored starches and sugars from the root system.

"When the resin glands or trichomes (on your buds) are about one-half turning a milky white or amber in color (versus clear or translucent), and the small hairs have begun to turn orange, brown or reddish in color, it is then almost time to harvest your weed. You have a window of 5-7 days for peak harvest and potency. I will tell you, the more amber the trichomes have turned, the 'stonier' the pot will likely be. This is why I recommend harvesting when about 1/2 of the resin glands have turned amber in color - be patient, and be sure of what you see."

Harvest & Manicure
Most indoor growers begin taking off the large fan leaves about a week before actual harvest. This is a good idea, especially once these leaves begin paling from green to yellow in color. Continue your harvest by taking off all leaves not associated with the buds and then move on to trimming off the smaller sugar leaves. Look for leaves with little resin coverage first and then move into the interior of the nuggets. It’s easier to remove leaves within the buds once they have dried out a bit, but that adds extra time and a second round of manicuring. By turning buds over and getting to the underside of smaller sugar leaves, it becomes easier to snip away at the stem and remove the entire leaf. Many growers like to only trim off leaf edges that come out of buds, leaving an aesthetic shape to the bud with the heavily resinated portion of the sugar leaves still intact within the buds.
 
Once the plants are cut, trimmed and manicured to perfection, it is best to hang branches upside down on strings strung across open spaces to get maximum air flow over your buds. Keeping buds on the branches does slow the drying, as the branches do retain some water however, this is the easiest way to completely surround buds with dry air without using drying chambers or machines.


Drying for Taste and Burnability
Now that you've harvested and are ready to dry and cure, you will want to preserve as much of the vibrant color and taste of your herb as possible. Buds should hang dry for five to seven days at the ideal temperature of about 70ºF with 50 percent humidity. You want to get most of the water out of the buds in those first days and then slow the process down for another week or so during the curing process.

At four to five days into the dry, the tips of some buds might be dry enough to pluck off and sample. After the buds have gone through their full cycle of drying, we want to slow the whole thing down and draw the rest of the moisture out very gradually. This is the curing process.

What’s the Cure?
If your herb is harvested correctly, there is very little need for long cures. Long cures are needed to make harsh herb smoke smoother. If you start out with smooth, clean herb, there's less need for long cures. Most buds should be cured and ready to smoke in less than two weeks after the drying period. Expert growers who harvest properly can complete curing in five or six days, but a good average can easily range from 10 to 14 days.

Inexperienced growers often tend to get impatient and only cure for a few days, but this can be a costly mistake when it comes to potency. Allowing the buds to cure evenly, which means drying at a slower rate, removes moisture within the buds so that all the THC can be converted in its psychoactive form.

The curing process evens out the moisture levels in the herb. You want the same amount of moisture in the center of the buds as you do on the outside of the buds until they are almost totally devoid of fluids. Completely drying the herb too fast can trap moisture in the middle and not allow for a proper cure.

For the curing process, you want to put the half-dried buds into air-tight containers. Inside the container, the buds will become evenly moist, inside and out, as they begin to “sweat." You can check to see if your buds are sweating and releasing moisture by gently squeezing them between your fingers to see if they feel damper than they did a few hours before sealing them up. Glass jars with rubber seals and lockdown lids are the best option for curing, but for large amounts of harvested buds, you’ll need something much bigger. Tight-sealing rubber or plastic bins are the best option for large quantities of buds but many growers feel these containers impart a plastic-type taste onto the buds. This can be offset by adding a small slice of lemon or orange peel to the bins toward the end of your cure.

Once the buds are again evenly moist, open the containers to let the moist air exchange with fresh air. Air exchanges are essential to the curing process. Not only do they prevent condensation from forming in your curing bins, but the fresh air is drier than the air you just allowed to escape from the container. The moisture still trapped in the herb will again slowly escape and moisten the new, fresh air. Open the container several times a day to exchange the moistened air with fresh air to slowly draw out the moisture in the buds. Eventually (again, one to two weeks) the moisture level in the herb will be at the right level to stash away and, of course, smoke!


"Roughneck is a hybrid Centennial Seeds bred from Jamaican Lambsbread and the Purple Rhino IBL. The result is a powerful Sativa-dominant hybrid that expresses beautiful purple hues and a delicious, somewhat savory bouquet. With its heavy Sativa influence, the effects are very strong and markedly stimulating. Roughneck is reccommended appropriate for: pain, focus, mood elevation, appetite suppression. The plant is easy to grow and very productive. Examples of Roughneck have tested >22% THC. Flowering time: 9 - 10 weeks."

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