DIY Organic Cannabis Growing: How to Cultivate Without Bottled Nutrients

In recent years, more cannabis growers have been ditching bottled nutrients in favor of organic cultivation. Why? Because organic growing doesn’t just produce healthier plants—it also enhances terpene profiles, improves sustainability, and creates a self-sufficient ecosystem that can be reused season after season.

Growing cannabis organically means using living soil, compost teas, and natural amendments to feed your plants instead of relying on synthetic fertilizers. This method mimics nature, allowing plants to thrive the way they were meant to. If you’re looking to grow cannabis with richer flavors, higher terpene content, and a more sustainable approach, this guide will teach you how.

Plants grown in organic systems develop natural defenses against pests and diseases.

Why Grow Cannabis Organically?

Organic cannabis growing is about working with nature rather than against it. Instead of relying on chemical-based fertilizers, organic growers create an ecosystem that provides everything cannabis needs naturally.

1. Better Flavor and Aroma

Terpenes—the compounds responsible for cannabis’ smell and taste—are more pronounced in organically grown cannabis. Synthetic nutrients can alter terpene production, often leading to a less flavorful end product. Organic soil, filled with beneficial microbes, helps enhance natural terpene expression.

2. Sustainability and Reusability

A well-built living soil system can be reused indefinitely, reducing waste and cost. Unlike synthetic nutrient regimens that require constant replenishment, organic soils improve over time.

3. Healthier Plants with Stronger Immunity

Plants grown in organic systems develop natural defenses against pests and diseases. Instead of relying on pesticides and fungicides, organic growers use companion planting, beneficial insects, and microbial life to maintain plant health.

4. Cost-Effective in the Long Run

While setting up an organic grow may take a little more effort upfront, you’ll save money over time by eliminating the need for expensive bottled nutrients. With proper care, your soil can last for years without needing replacement.

Your soil should be light, well-aerated, and capable of retaining moisture.

Building a Living Soil for Cannabis

The foundation of organic growing is living soil—a mix of organic matter, beneficial microbes, and natural amendments that feed your plants naturally.

Step 1: Start with a High-Quality Base Soil

Your soil should be light, well-aerated, and capable of retaining moisture. A good base mix includes:

• Coco Coir or Peat Moss – Holds moisture and provides structure.
• Compost or Worm Castings – Adds beneficial microbes and slow-release nutrients.
• Perlite or Pumice – Improves aeration and prevents compaction.

Step 2: Add Organic Amendments

Instead of synthetic fertilizers, organic growers use natural amendments to provide essential nutrients. Here’s what to add to your soil:

• Nitrogen (N) Sources: Alfalfa meal, blood meal, fish meal
• Phosphorus (P) Sources: Bone meal, fish bone meal, bat guano
• Potassium (K) Sources: Kelp meal, wood ash, greensand
• Calcium & Magnesium: Crushed oyster shells, gypsum, dolomite lime
• Trace Minerals: Azomite, basalt rock dust, glacial rock dust

Each of these amendments breaks down slowly, providing a steady nutrient supply without burning your plants.

Step 3: Boost Microbial Life with Compost & Worm Castings

Healthy soil relies on beneficial microbes to break down nutrients and make them available to plants. Adding compost and worm castings improves microbial activity, resulting in healthier roots and better nutrient absorption.

Step 4: Mulch to Retain Moisture and Protect Microbes

A layer of organic mulch (such as straw, shredded leaves, or wood chips) helps regulate soil temperature, retain moisture, and feed microbes as it decomposes.

Compost teas increase microbial life, improve nutrient uptake, and help plants fight off pests naturally.

Feeding Your Cannabis with Compost Teas

Rather than using bottled liquid fertilizers, organic growers feed their plants with compost teas—liquid extracts of compost and beneficial microbes that help plants absorb nutrients.

How to Make a Basic Compost Tea

Ingredients:

• 5 gallons of dechlorinated water
• 2 cups of high-quality compost or worm castings
• 1 tablespoon of molasses (feeds microbes)
• 1 tablespoon of kelp meal (boosts growth)

Instructions:

1. Fill a bucket with water and let it sit for 24 hours to remove chlorine.
2. Place compost and amendments in a mesh bag or pantyhose.
3. Submerge the bag in the water and add molasses.
4. Aerate with an air pump (or stir vigorously) for 24–48 hours.
5. Apply immediately as a root drench or foliar spray.

Compost teas increase microbial life, improve nutrient uptake, and help plants fight off pests naturally.

When plants transition to flower, they need more phosphorus and potassium. Natural alternatives include: Banana Peel Tea – A simple tea made by soaking banana peels in water, rich in potassium.

Natural Alternatives to Bottled Nutrients

If you’re used to liquid nutrient feeding schedules, you might wonder how organic growers provide specific nutrients at different stages of growth. Here are natural ways to feed cannabis without bottled nutrients:

Vegetative Stage

During veg, cannabis needs high nitrogen for leaf and stem development. Instead of synthetic nutrients, try:

• Alfalfa Meal Tea – Soak alfalfa meal in water for 24 hours and use as a nutrient-rich feed.
• Fermented Plant Juice (FPJ) – Made from blending leafy greens with molasses and fermenting for a few days.

Flowering Stage

When plants transition to flower, they need more phosphorus and potassium. Natural alternatives include:

• Banana Peel Tea – A simple tea made by soaking banana peels in water, rich in potassium.
• Bone Meal or Fish Bone Meal – Slow-release phosphorus sources for bud development.
• Kelp and Seaweed Extracts – Enhance resin production and terpene expression.

Ladybugs, lacewings, and predatory mites keep harmful pests in check.

Managing Pests Organically

Instead of chemical pesticides, organic growers use natural pest control methods:

• Neem Oil & Karanja Oil – Helps prevent aphids, mites, and fungal infections.
• Companion Planting – Growing basil, marigolds, or clover near cannabis to repel pests.
• Beneficial Insects – Ladybugs, lacewings, and predatory mites keep harmful pests in check.

Reusing and Maintaining Organic Soil

One of the best parts of organic growing is reusability. Instead of throwing soil away, you can recharge it for the next cycle:

1. Remove large roots and aerate the soil.
2. Add compost, worm castings, and organic amendments.
3. Reapply mulch and let the soil rest for a few weeks before planting.

With each cycle, your soil becomes richer and more productive, eliminating the need for new soil purchases.

Her Seeds LLC.

Conclusion: Grow Healthier Cannabis, Naturally

Organic cannabis growing is better for the plant, the planet, and your wallet. By embracing living soil, compost teas, and natural amendments, you can cultivate high-quality cannabis with richer flavors and a lower environmental impact.

If you’re ready to start your organic grow, choose high-quality genetics from Her Seed Bank. We offer premium seeds from trusted breeders like Dutch Passion, Barney’s Farm, and Sweet Seeds—perfect for organic cultivation. Follow us on Instagram for more organic growing tips, community updates, and seed drops!