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Growing Crops with LED Sheet Lighting

10 Things to Know Before You Grow
Combating Nutrient Deficiencies
Why You Should Grow Your Own
Growing Crops with LED Sheet Lighting
Guano is the Way to Go
How To Battle A Critter Infestation
How To Reduce Odor When Growing Indoors
How to sex your plants
Hydroponic How To Ebb & Flood
Hydroponic How To Nutrient Flow Technique
Hydroponic How To Peat & Perlite
Pro Tips for Harvesting and Curing Your Crop
Re Coup Winter Costs Grow Outdoor
5 Tools That Every Serious Grower Needs
The Guide to Growing Mediums
The Sulphur Lamp
The Magnetic Induction Lamp
Tools Everyone Should Have in their Arsenal



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Cannabis cultivators the world over know the obsessive, purgatorial feeling of waiting for their plants to mature to discern sex – female, male or hermaphrodite. A male plant, while essential for reproduction, can also run rampant across a garden and devastate an entire crop of flowering female plants — intended for consumption — by inadvertently pollinating them and causing hermaphroditism. If culled and managed correctly, the male becomes a key part of this sustainable, perpetuating reproduction process.

There’s no way to ascertain if a seedling is male or female with the naked eye. Growers often find themselves on the edge of their seats waiting for plants to mature while telltale signs of sex slowly reveal themselves.

As they mature, plants express themselves physically in characteristic ways. Size is a great indicator of sex. Males tend to grow faster and higher in the first stage of growth than do the females. Male plants have a longer intermodal space as well. The intermodal space is the space between the limbs of the plant that originate from the main stalk. Females are smaller than a male plant in the beginning growth stages, with shorter intermodal spaces and a squatter appearance.

Male plants also get a woodier stalk sooner than do females. This is needed to support the taller plant. The male plant is usually the source of fiber that is used in fabrics and other industries. While the female plant is also used as a source of industrial fiber, the male plant is preferred. Male cannabis plants look more like hemp than does a female cannabis plant. Its fibers are almost as tough, but the cellulose that the male cannabis plant contains isn’t as robust as is the male hemp plant.

The goal is usually to raise a crop without seeds. This is known as a sin similla plant. It’s a Spanish word that aptly translates as “without seeds.” Most people bunch the two words into one, making it sinsimilla to the foreign tongue. A sinsimilla plant, then, is an unpollinated female plant.

Flowering in both sexes usually starts within the third to fourth week of growth. There can be more recent signs that a plant is male, but the clincher is when they start to flower. The first buds will usually begin where the limb reaches the main stalk.

A male plant will have a purely green bud. The flower comes later. It looks like it’s a rolled up flower that hasn’t unrolled yet. A female plant will have a sprout that looks more like a pair of long thin flowers as it sprouts. The sprouts on the males will eventually open into a pollinating flower. If the male isn’t culled it will pollinate the females and cause seeds to appear. The female plant will be less potent and will harvest less bud. Plus you’ll have to pick out all of the seeds or the pipe will periodically explode as it burns a seed.

For situations when seeds are the desired result, there is always a male in the crop. To have the females produce copious amounts of seeds, just leave the male crop where it is and with the help of a good strong fan to circulate the male’s pollen, you’ll have bunches of seeds hanging from the females in eight to 10 weeks.

Know a mature seed by its texture and appearance. Its texture will be firm and light, usually with spots of some amount. Once all of the seeds look alike it is time to harvest the seeds.
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