Cannabis Grow Guide
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Start Growing at Home

A beginner-friendly guide to cannabis cultivation, from seed to harvest.

Growing your own cannabis is the most cost-effective way to access the plant long-term. Whether you're growing CBD hemp or THC-producing cannabis (where legal), the fundamentals are the same. This guide covers what you need to get started.

Important: Cannabis cultivation laws vary by state and locality. Some states allow home growing for personal use, while others prohibit it entirely. Verify your local laws before starting.

Choosing Your Seeds

The three main seed types for home growers:

Feminized Seeds

Bred to produce only female plants (the ones that produce smokeable flower). Eliminates the need to identify and remove males. The most popular choice for beginners.

Autoflower Seeds

Begin flowering automatically after a set period (usually 2–4 weeks) regardless of light cycle. Faster harvest, smaller plants, and forgiving for beginners. Ideal for limited space.

Regular Seeds

Produce both male and female plants (roughly 50/50). Used by breeders or experienced growers who want to create their own crosses. Requires sexing plants during early flowering.

Trusted Seed Banks

We've partnered with established seed banks that offer reliable genetics, germination guarantees, and discreet shipping.

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ILGM

I Love Growing Marijuana

One of the most recognized names in the seed market with a germination guarantee. Extensive strain library with autoflower, feminized, and high-CBD varieties. Free grow guides included with every order.

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Multiverse Beans

Community-Driven Seed Bank

Wide selection from top breeders with a strong community reputation for customer service and quality. Known for stocking hard-to-find genetics from respected breeders.

CODE: multiverse420

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North Atlantic Seed

U.S.-Based Seed Bank

Fast domestic shipping from the U.S. Curated selection of genetics from respected breeders. Popular among American home growers for reliability and quick delivery.

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See all seed banks we recommend →

The Growing Stages

Cannabis goes through distinct growth phases, each with different requirements:

Germination

1 – 7 days

Seeds sprout and the tap root emerges. Most growers use the paper towel method (seeds between moist paper towels in a warm, dark place) or plant directly into moist soil. Keep temperatures around 70–80°F (21–27°C).

Seedling Stage

2 – 3 weeks

The first set of true leaves appear. Seedlings need gentle light (18–24 hours), moderate humidity (65–70%), and light watering. Avoid overwatering — it's the most common beginner mistake.

Vegetative Stage

3 – 8+ weeks

Rapid growth of stems and leaves. Plants need 18+ hours of light per day, regular feeding with nitrogen-rich nutrients, and training techniques (topping, LST) to shape the canopy. This is when the plant builds its structure.

Flowering Stage

7 – 11 weeks

Triggered by switching to 12 hours of light and 12 hours of uninterrupted darkness (autoflowers do this automatically). Buds form and develop. Switch to phosphorus/potassium-rich nutrients. Monitor trichomes to determine harvest timing.

Harvest & Curing

2 – 4+ weeks post-chop

Cut plants when trichomes are mostly cloudy (use a jeweler's loupe). Dry slowly over 7–14 days in a cool, dark space at ~60°F with 60% humidity. Then cure in sealed glass jars for 2–4+ weeks, burping daily. Curing develops flavor and smoothness.

Basic Equipment

For an indoor grow, the essentials are:

  • Light — LED grow lights are the standard for efficiency and low heat output
  • Grow tent or dedicated space — reflective interior, controllable environment
  • Growing medium — soil is most forgiving for beginners; coco coir and hydroponics offer more control
  • Pots/containers — fabric pots (3–5 gallon) promote air pruning of roots
  • Ventilation — inline fan with carbon filter for odor control and fresh air exchange
  • pH meter — soil: 6.0–7.0; hydro: 5.5–6.5. pH problems cause most nutrient issues
  • Nutrients — grow-specific formulas (veg and bloom stages have different needs)
  • Timer — automate your light schedule precisely

For outdoor grows, many of these are handled by nature — but you still need quality seeds, nutrients, and pest management.

Affiliate Disclosure: Some links on this page are affiliate links. We may earn a commission if you make a purchase, at no extra cost to you. We only recommend seed banks we believe offer reliable genetics and service.