How to Increase Plant Yields Naturally: The Complete Grower's Guide

Every grower wants the same thing: bigger yields, healthier plants, and better results — without loading up on synthetic chemicals. The good news? The most powerful yield-boosting techniques are also the most natural. In this guide, we’ll walk you through exactly how to increase plant yields naturally, using science-backed methods that work grow after grow.

Why Natural Growing Produces Superior Results

Synthetic fertilizers can push short-term growth, but they come at a cost — salt buildup, degraded soil biology, nutrient lockout, and plants that are dependent on chemical inputs to survive. Natural growing works with your plants’ biology instead of forcing it, producing stronger root systems, more resilient plants, and yields that improve season after season as your soil gets healthier.

1. Supercharge Photosynthesis with CO2 Enrichment

This is the single most underutilised yield booster in indoor growing. CO2 is the raw material of photosynthesis — without enough of it, your plants physically cannot grow as fast as they’re capable of, no matter how good your lights, nutrients, or genetics are.

Most indoor grow rooms drop below 300 PPM CO2 as plants consume it. Raising levels to 900–1,200 PPM can increase growth rates by up to 30%. The TNB Naturals CO2 Enhancer makes this effortless — just add warm water to the bottle and it produces natural, consistent CO2 for 6–8 weeks with zero equipment.

• ✨ Up to 30% faster growth
• ✨ Denser canopy development
• ✨ Bigger, heavier harvests
• ✨ No tanks, timers, or monitors needed

2. Feed Your Soil with Kelp Meal

Healthy soil = healthy plants = bigger yields. It’s that simple. Kelp meal is one of the most powerful natural soil amendments available, delivering over 60 minerals, natural growth hormones (cytokinins), and alginic acid that transforms your growing medium.

TNB Naturals KELPTASTIC — made from 100% pure Canadian North Atlantic kelp — delivers:

• ✨ Explosive root development via natural cytokinins
• ✨ Improved soil structure and water retention via alginic acid
• ✨ Supercharged microbial activity for better nutrient availability
• ✨ Lateral bud development for more flowering sites
• ✨ Natural pest and stress resistance via betaines and mannitol

Mix into soil, use as a top dressing, or brew as a compost tea. The results speak for themselves.

3. Optimise Your Light Intensity and Spectrum

Plants can only use as much CO2 as their light intensity allows — and vice versa. This is called the CO2-light relationship. As you increase CO2 levels, your plants can handle and benefit from higher light intensity. The two work together synergistically.

• Ensure your lights are at the correct height for your growth stage
• Use full-spectrum LEDs or HPS for flowering stages
• Increase light intensity gradually as CO2 levels rise
• Maintain consistent light cycles — 18/6 for veg, 12/12 for flower

4. Master Your Watering Technique

Overwatering is the #1 mistake indoor growers make. Waterlogged roots can’t absorb oxygen, beneficial microbes die off, and plants become stressed and stunted. The fix is simple:

• Water when the top inch of soil is dry
• Water to 10–20% runoff to prevent salt buildup
• Use pH-balanced water (6.0–7.0 for soil, 5.5–6.5 for hydro)
• Let your medium dry slightly between waterings to encourage roots to search deeper

5. Train Your Plants for Maximum Canopy Coverage

Plant training techniques redirect growth energy from a single main cola into multiple equal-sized bud sites — dramatically increasing your yield per plant without any additional inputs.

• Low Stress Training (LST) — gently bend and tie branches to create a flat, even canopy
• Topping — remove the main growing tip to create two main colas instead of one
• Screen of Green (SCROG) — weave branches through a screen for maximum light penetration
• Defoliation — remove large fan leaves blocking light from lower bud sites

6. Maintain Optimal Temperature and Humidity

Plants have a specific comfort zone — push outside it and growth slows, stress increases, and yields suffer.

• Vegetative stage: 20–28°C, 50–70% humidity
• Flowering stage: 18–26°C, 40–50% humidity
• Late flower: Drop humidity to 35–45% to prevent mould and maximise resin production
• Maintain good airflow with oscillating fans to strengthen stems and prevent hot spots

7. The TNB Naturals Natural Grow Stack

For the most complete natural yield-boosting system available, combine:

• 🌊 TNB Naturals CO2 Enhancer — fills your grow space with natural CO2 for up to 8 weeks per bottle
• 🍁 TNB Naturals KELPTASTIC — supercharges roots, soil biology, and bud development with pure Canadian North Atlantic kelp meal

Together, these two products address the two most overlooked yield limiters in indoor growing — atmospheric CO2 and soil nutrition. Growers who run both consistently report some of their best harvests ever.

Frequently Asked Questions

What is the fastest way to increase plant yields naturally?

CO2 enrichment combined with kelp meal supplementation delivers the fastest, most noticeable yield improvements for indoor growers. The TNB Naturals CO2 Enhancer and KELPTASTIC work synergistically to push plants to their genetic potential.

Does CO2 really increase yields?

Yes — extensively documented in horticultural research. Raising CO2 from ambient levels (400 PPM) to 900–1,200 PPM can increase photosynthesis efficiency and growth rates by up to 30%.

Is kelp meal good for all plants?

Yes. KELPTASTIC works for vegetables, herbs, flowers, indoor plants, outdoor gardens, lawns, and hydroponic systems. It’s 100% organic and safe for all growing methods.

How long does it take to see results from natural growing methods?

CO2 enrichment shows results within days as plants accelerate their growth rate. Kelp meal improvements to root development and soil biology are typically visible within 2–4 weeks of first application.

Start Growing Bigger Yields Naturally Today

Increasing your plant yields naturally isn’t complicated — it’s about giving your plants exactly what they need: clean air rich in CO2, living soil packed with nutrients and biology, optimal environment, and smart training. The TNB Naturals system handles the two biggest pieces of that puzzle simply, naturally, and effectively.

Proudly Canadian. Naturally effective. 🍁