Saturday, December 18, 2021

Cannabis (Someday)

thriving

ailing

dead

There is no God.

scale

jars

Four months resulting in three jars. It could all fit into one jar, but I want to keep the strains separate.

The most promising product is from the NYC Diesel plants. It smells vaguely of lemon gasoline and will catapult your mind into diamond-grinding rumination. It will also give you bronchitis, because it was harvested prematurely, dried too quickly, and has not yet cured. It will probably never cure.

The other stuff smells like hay. Maybe I'll bake cookies with it.

Relative humidity is a funny thing. Actually it's not funny at all. Nothing is funny. Life is pain.

the start

Since our last installment, I re-potted each plant into its own small container. The Grape Ape plants (left) took to their new homes immediately, springing back to life with a growth spurt. The $100 O.G. plants (center) took longer to acclimate but also eventually thrived. The NYC Diesel plants (right) looked like they were going to stay lanky and spent, but after a few doses of nutrients by soil and by spray, they too perked up.

better

I planted some spicy peppers in solo cups, to make better use of the lights. They all died.

untied

tied

After a while, the plants had grown taller and largely healthy. They had been receiving eighteen hours of artificial light per day, followed by six hours of darkness. Kept this way, the plants will continue to grow indefinitely, without ever trying to reproduce.

The stuff that gets you high occurs with the highest concentration in sticky resins secreted by the female sex organs in their fruitless attempt to capture pollen.

Cannabis has been selectively bred by humans to produce "flowers" that are:

It's all very unnatural. But organic! It's not a big truck.

Outdoors, cannabis will switch into reproductive mode ("flowering") when there is less than thirteen hours of sunlight each day.

Indoors, we change the timer on our lights to be on for twelve hours and off for twelve hours. The plants don't know the difference, they're so stupid.

Cannabis doesn't survive Winter, so the shortening photoperiod tips off the plant to its impending death, which it copes with by ramping up cannabinoid production as a side effect of attempting to reproduce. Bless them.

Before the plants go full on and get really into sex mode, you have to bend them over and tie them down.

big untied

big tied

The change in photoperiod sets off a hormonal change in the plant that will eventually cause it to focus most of its energy on sex organ enlargement. However, the first phase of that hormonal change instead stimulates the plant to suddenly grow taller. The plant can roughly double in height over the first week or two of the reduced photoperiod. This is called "the stretch."

My guess is that if you reproduce by catching sperm in the wind in a forest, your chances are improved if you're above the brush.

What it means for indoor growers is that you're going to run out of room, or your lights are going to burn your plants, or whatever.

So we tie those girls down. As close to ninety degrees as you can manage, which is nerve-racking, but doable.

Cannabis plants are apical dominant, which means that the highest point on the plant undergoes the greatest growth. What is the highest point on the plant when you've bent it sideways? The plant cannot decide, and so it stimulates growth in all of the nodes fully exposed to light (until one becomes dominant).

The point of plant bondage is to continually thwart apical dominance. Every time an eager branch breaks the mold, tie it down. The result of a few weeks of this so-called low-stress training is a shorter, bushier plant with multiple bud sites that will one day grow into giant chunks of weed. If you don't train the plant, then you end up with one giant chunk of weed at the top, and not much elsewhere.

In my case, I was going to run out of vertical space unless I trained the plants. So I tied them down against their wishes.

flowers

After a few weeks of reduced photoperiod, I saw flowers beginning to develop.

flower with pepper

Those white "hairs" grow long and then fill in at the base with sticky, spongy flower tissue. Then the hairs turn reddish brown and curl flat onto the flower. The result is weed.

maturing

I can't show you what ready-to-harvest weed looks like, because around when that picture was taken, the plants began to ail. It's natural for cannabis to shed leaves and show autumn colors towards the end of their flowering period, but these plants were aging too soon, and without having put on any weight of flower.

Then I left the plants for a week without water, and because I did not leave a window cracked open, the building's steam heat cooked the plants to death and dried them to a crisp right in their pots.

Problems began before then, though. At one point, I discovered symphylids crawling through the soil of one of the Grape Ape plants. Symphylids look like centipedes, but rather than preying on insects, they eat the roots of cannabis plants, which then nearly always die. After a soil drench with permethrin, I didn't see them anymore.

When I disposed of the plant roots today, I noticed green pockets of what I assume to be mold.

There was also the problem of low humidity. Here's a picture of a hygrometer in the grow space before I left for a week:

conditions

88°F and 26% relative humidity. That's an oven. Flowering cannabis plants like it somewhere in the 70s and 50% relative humidity.

The temperature problem can be alleviated with better air circulation, and the humidity can be increased with a humidifier. Then the problem is that the increased airflow makes the humidifier ineffective. The grow space would start at around 30% relative humidity. Then I would have a humidifier billow clouds of water droplets into the air for twenty-four hours. The grow space would end up at around 30% relative humidity.

I might be able to solve both the heat problem and the low humidity problem with something called a swamp cooler, but really I think that the underlying problem is the location of the grow space. It's at the top of a high ceiling in the back of an apartment with no ventilation, and is under intense light. Even before I had the grow setup, my bedroom could be ten degrees warmer than my kitchen. I would need yards of winding ductwork and a powerful inline fan to move enough air to keep that space cool. I might as well run a snowblower in my bathroom.

Woe is me!

Though this crop was an exercise in waste and failure, it was not without its lessons:

It's all about the roots.

While I mull over what to do about the temperature and humidity in the grow space, I'll start some new seeds germinating.

seeds in water

Better luck next time.

Gardening