What You're Actually Signing Up For

What You Need to Know

A cannabis plant is on a clock. It doesn’t know it’s in your spare room, it doesn’t know you paid for the seed, and it doesn’t know you’ve been reading forums since Tuesday. As far as it’s concerned, it has one summer to live and one job to do before winter kills it. Everything it does — every leaf, every root, every flower — makes sense once you understand that single fact. Get that, and you’ve already understood about 80% of the decisions you’ll make as a grower.

Cannabis is an annual. In nature, a seed drops in spring, the plant grows through summer, flowers in autumn as the days shorten, makes seeds, and dies. One life. One shot. No second season. Indoors, you’re replicating that whole cycle in a box — you control the light, so you control the seasons. Your job isn’t to make it grow. The plant already wants to do that. Your job is to set up the conditions and then, mostly, get out of the way.

Before you spend a euro, you need four things straight in your head: how long this takes, where you stand legally, what it actually costs, and why you’re only growing one plant. None of these are exciting. All of them save you grief.

The Timeline — What You’re Committing To

Here’s the whole journey, start to finish. You don’t need to memorise it. Think of it as the map you glance at before a road trip.

• Germination (3–10 days) — Seed to sprout. A small white root pushes out. Your only job is warmth, moisture, and patience.
• Seedling (2–3 weeks) — The sprout breaks the surface, the first leaves open. She’s fragile. You’ll want to check on her every hour. Don’t.
• Vegetative (3–16 weeks) — She builds her body: roots, stems, branches, leaves. Lights on 18 hours a day. Indoors, you decide how long this stage lasts.
• Flowering (6–12 weeks) — You switch the light to 12 hours on, 12 off. She thinks autumn has arrived and starts making flowers. This is what you’ve been waiting for, and where impatience kills more grows than any pest.
• Harvest and cure (2–6 weeks) — You cut her, dry her slowly, and cure her in jars. This is where good becomes great, or where rushing turns a decent grow into something that tastes like hay.

Roughly three to five months from seed to harvest for most indoor grows, plus another two to four weeks of drying and curing after the chop. Autoflowers run faster — eight to twelve weeks seed to harvest — because they don’t wait on you to flip them. Either way, this is not a weekend project. It’s a season.

The Legality Sense-Check

This book teaches horticulture. It does not give you legal cover. Cannabis cultivation sits in different legal places depending on where you are, and the law where you’re standing is the law that applies to you, not the law in some video you watched. That’s a fact to establish before you buy a tent, not after a knock on the door.

So the sense-check is plain: know your local position before you start. If you’re not prepared to find that out, you’re not prepared to grow. This isn’t me being po-faced. It’s the first piece of risk you control, and it’s the cheapest one, because checking costs nothing.

Seb’s Corner — One Plant, One Clock

[SEB] Annual. A plant that completes its whole life cycle — seed, growth, flower, seed, death — in a single year. Why it matters: cannabis is racing a season that exists only in its genetics. Indoors there’s no real winter coming, so you are the season. You start her clock when you germinate, you trigger autumn when you change the light, and you end the run when you harvest. Every “when do I do X” question is really “where am I on the clock.” Learn the clock and the rest stops feeling random.

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How To Apply This

You’re not setting anything up yet. Lesson 2 tells you what to buy. Right now your whole job is to get honest with yourself on four points.

1. Cost the whole thing, not just the tent. A realistic first indoor grow runs you a tent, a light, a fan, pots, soil, and seeds up front — and then electricity on top, month after month, for the whole run. The running cost is the one beginners forget. Add it up before you start, not after the bill arrives and you’re reverse-engineering where the money went. We’ll itemise the kit next lesson.
2. Pick your window. Look at the next four to five months. Are you around? Holidays, house moves, a fortnight in Spain — a plant needs eyes on it every couple of days. If you can’t give it that, wait until you can.
3. Settle the legal question first. Find out where you stand locally. Make it a decision, not a thing you’re avoiding.
4. Decide where she’ll live and who’ll know. The answer to “who knows” is as close to nobody as you can manage. More on that in the watch-out below.

The One-Plant Rule

One plant. That’s the whole Level 1 brief — keep one plant alive, seed to first true leaves and beyond. Not three, not “a few backups in case one dies.” One.

Here’s why. Everything you’re about to learn — watering, light distance, when to do nothing — you learn by watching one plant respond to one change. Run six and a problem on the back-left corner becomes six problems you can’t tell apart. One plant is a conversation. Six is a crowd shouting. You want the conversation.

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Watch Out For

• The Hover. The new grower whose watering can is never far from his hand, checking the soil at 7am and topping it up at lunch just in case. The instinct to fuss is almost impossible to override when you’re new. Knowing that now is half the battle. Most of what kills a first plant is help, not neglect.
• Underestimating the clock. People plan for the exciting bit — flower — and forget the boring three months of veg and the boring month of cure. The cure is where most of the quality is decided, and it happens after you think you’re finished.
• Telling people. The number who should know about your grow is as close to zero as you can manage. Not your best mate, not the lad at five-a-side. A grow has dozens of quiet ways to give itself away; a conversation in a pub is the loudest. You can control your fan and your light schedule. You cannot control another person’s mouth. Keep it to yourself and you keep the peace of mind.
• Buying before you’ve read Lesson 2. The biggest first-grow money pit is gear you didn’t need. Sit on your hands one more lesson.

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Quiz

1. (True / False) A cannabis plant flowers because it knows it’s in a grow tent.

2. (Multiple choice) Roughly how long does a typical photoperiod indoor grow take from seed to harvest, before drying and curing?

• a) 2–3 weeks
• b) 6–8 weeks
• c) 3–5 months
• d) About a year

3. (Multiple choice) What’s the recommended number of plants for your first grow?

• a) As many as fit in the tent
• b) Three, so you’ve got backups
• c) One
• d) Six

4. (Scenario) A mate says: “Just tell your best friend you’re growing — she’d never say a word.” What’s the sound move, and why?

5. (True / False) The running cost of electricity is a one-off you can ignore when budgeting a grow.

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Answer Key

1. False. The plant runs on its genetic clock and the light schedule you give it. It has no idea where it is. You are the season.
2. c) 3–5 months. Autoflowers are faster (8–12 weeks); add 2–4 weeks of drying and curing on top either way.
3. c) One. You learn by watching one plant respond to one change. More plants just blur the lessons.
4. Keep it to yourself. The target number who know is as close to zero as possible. You can’t plug a leak in another person’s mouth, however well-meaning. The fewer people who know, the fewer ways it travels.
5. False. Electricity runs for the whole grow, every month. It’s the cost beginners forget. Add it to the budget up front.