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- *********************** When To Harvest *************************
-
- Disclaimer: The author does not condone any illegal activity. The facts
- presented do not necessarily represent the opinion of the author.
- Mr.Brown -- 10/15/94.
-
-
- The question of when to harvest tenderly cared-for plants is a question
- that puzzles many new growers. Most farmers' goal is to pluck the fruit
- at the exact moment when the potency of the bud is at is peak.
- Realistically, the skills needed to detect the specific day (or even hour)
- when a plant is at its peak can only be acquired through years of
- experience. However, even the novice grower should be able detect the
- window of time during which the harvest results in premier crop of
- outstanding bud.
-
-
- 0) Maturity and THC
-
- Although some growers are interested in fiber content, most people
- consider the plant to be mature when the percentage of THC found in the
- plant reaches its maximum. It is not practical for the average grower to
- actually measure THC in a plant, as the chemistry is somewhat complex. In
- a growing plant, each successive pair of leaves contains more THC than the
- previous pair. The budding tips of the plant contain the most THC of all.
- Both male and female plants contain THC. In fact, some research has shown
- that in the early stages of growth the males actual ly contain more THC
- than the females (Frank and Rosenthal, Marijuana Grower's Guide, p. 66).
- Even conniseurs believe it is worth cutting and sampling shoots before the
- THC has reached its maximum. Clarke suggests that the best bioassy for
- pot is to roll joints of several different strains, invite all your
- friends over, and see which pile of joints disappears first (Marijuana
- Botany, p. 94)
-
-
- 1) Plant Size
-
- The size of the plant has little to do with its maturity. Outdoors, a
- plant might reach a height of over eight feet (2.5m) and still not be
- ready for harvest. Indoors, mature, budding plants can be under 18" (.5m)
- high.
-
-
- 2) Photoperiod - The Key to Maturation
-
- The chronological age of the plant has little to do with its maturity.
- How quickly a plant matures is mostly dependent on the amount of light the
- plant receives each day (photoperiod). Typically, a plant will transition
- from the growing (vegitative) stage to the budding stage when the light
- per day drops below 12 hours. This is not to say that a 3-week-old
- seedling will begin to bloom when the light is cut. As a general rule, a
- plant must be a minimum of 60 days old before it is mature enough to respo
- nd appropriately to decreased light. For indoor growers, the decision on
- when to cut the photoperiod depends on available growing space, as well as
- the need to harvest weed. Some growers report that clones (cuttings) can
- be forced to bloom prior to 60 days old, perhaps since the cutting itself
- is somewhat mature at the time it is rooted.
-
-
- 3) Male Versus Female
-
- Almost always, male flowers will show prior to female buds. Thus, once
- the males in the garden are detected, you can be sure that that the female
- budding process will start soon - usually within 1-2 weeks.
-
-
- 4) Different Varieties
-
- Many gardeners report that certain cannibis varieties take longer to
- mature than others. In particular, the narrow-leafed Sativas are said to
- take significantly longer to initiate and complete budding, as compared to
- the wide-leafed Indicas. Under some conditions, Sativas will require an
- additional month or more to mature after the Indicas have been harvested.
-
-
- 5) Time of Year
-
- Obviously, indoor growers cannot use the seasons as a guide to harvesting
- (though a cold winter-time grow room can significantly retard the growth
- of the plants). Outdoor growers on the other hand can use the seasons as
- a predictor of the ideal harvest t ime. In the Fall, once the length of
- day drops below 12 hours, the count-down to harvest will be begin.
- Weather conditons will affect the exact harvest day from year to year, but
- generally you can expect to harvest within the same two-week window each
- year. If you can avoid it, don't harvest during or immediately after a
- rainy spell.
-
-
- 6) Monitoring Buds
-
- The best way to tell if the plant is ready is to examine the bud. In the
- paragraphs below, the terms "pistal" and "stigma" refer to the white hairs
- in the center of the female bud. The term "calyx" refers to the pod that
- would surround the seed (were the plant to be fertilized). Many growers
- elect to pick each bud individually, as it reaches it prime.
-
- "Buds are at their peak potency about one week after flower formation
- slows...Harvest the plants when about half the stigmas in the buds have
- withered... When the plants are left in the ground, the resinous qualities
- of the plant may become more apparent. The bracts and tiny leaves may
- swell in size...The resin content of these buds may be higher, [but] the
- grass will smoke more harshly than if the buds were younger when picked."
- Frank and Rosenthal "Marijuana Growers Guide" pg 289, pg 295.
-
- "In the primordial calyxes the pistils have turned brown; however, all but
- the oldest of the flowers are fertile and the floral clusters are
- white...Many cultivators prefer to pick some of their strains during this
- stage in order to produce marijuana with a clear cerebral, psychoactive
- effect." Robert Connell Clarke "Marijuana Botany", pg 140.
-
- "Eventually the pistils start to turn color from pale white to red or
- brown...When the glands have swelled and the pistil has receded into the
- false pod, the bud is ready to pick." Ed Rosenthal, "The Closet
- Cultivator", pg 100.
-
- "At the peak of florescence, all but the oldest of flowers have white
- pistil development...Another indicator is bouquet. When a plant is at the
- peak of florescence, it has a sweet and musky fragrance. Later, it loses
- the sweetness." Kayo, "The Sinsemilla Technique", pg 125.
-
- "The best way to harvest is to examine the resin glands on each bud. As
- they turn from clear to amber, that is the optimum time to pick. Buds
- usually mature from the top down, if grown under artificial light, and you
- will end up with more high-quality p ot if you pick each bud when ready.
- However, the plant will not just continue to produces buds at the same
- rate. Like any other plant, the flowering cycle lasts a specific period of
- time. If you wanted a further harvest of buds, the plant would need a
- second cycle of vegetative growth. This can be achieved indoors by simply
- turning the lights back up to a 24 hour cycle for a few weeks. Outdoors
- though, you are dependent on the seasons. Frost and long nights will
- usually kill the plant. Of course, such a strategy is only variable
- <viable?> if growing a few plants. If your operation runs on an
- industrial scale, just drive the combine harvester through the field."
- (-peter alt.hemp posting)
-