Wick System

Introduction

The Wick System is the simplest hydroponic method in existence. Wicks — usually cotton rope, nylon cord, or felt strips — draw nutrient solution up from a reservoir to the growing media by capillary action. No pumps, no electricity, no moving parts. It's even simpler than Kratky because the plant doesn't sit directly over the reservoir.

Wick systems are perfect for absolute beginners, small spaces, classrooms, and anyone who wants a no-maintenance introduction to growing without soil.

How It Works

1. The Reservoir — A container below the growing area holds nutrient solution.
2. The Wicks — Strips of absorbent material (cotton rope, nylon cord, or felt) run from the reservoir up into the growing container.
3. Growing Media — The upper container holds a moisture-retentive media like perlite, vermiculite, or coco coir.
4. Capillary Action — The wicks passively draw solution up from the reservoir into the media through capillary action, keeping the root zone consistently moist.
5. Plant Growth — Roots grow into the moist media and absorb nutrients at their own pace.

Best Crops

Wick systems work best with small, low-water-demand plants:

• Herbs — Basil, parsley, chives, and oregano
• Microgreens — Quick-growing and light-feeding
• Lettuce — Small-head varieties like butterhead
• Small Greens — Arugula, watercress, and baby spinach
• Ornamental Plants — Small houseplants also thrive

Avoid large or thirsty plants — the wick can't deliver nutrients fast enough for tomatoes, peppers, or other heavy feeders.

Getting Started

1. Choose containers — Any two containers that can stack or sit at different heights. A cut 2-liter bottle works great.
2. Prepare wicks — Cut 2-3 strips of cotton rope or nylon cord per plant container. Each wick should reach from the bottom of the reservoir to the middle of the growing container.
3. Thread wicks — Run the wicks through holes in the bottom of the upper container and into the growing media.
4. Add growing media — Fill the upper container with a 50/50 mix of perlite and vermiculite (or pure coco coir).
5. Fill and plant — Fill the reservoir with nutrient solution, plant seedlings in the media, and you're done.

Recommended Supplies

Tips for Success

• Use multiple wicks per plant — A single wick may not deliver enough solution. Use 2-3 wicks for reliable moisture levels.
• Choose the right media — Perlite/vermiculite mixes and coco coir work best because they retain moisture. Don't use clay pebbles — they drain too fast for wicking.
• Pre-soak your wicks — Dry wicks take time to start wicking. Soak them in water before setup.
• Keep the reservoir full — If the reservoir runs dry, the wicks dry out and stop working. Check every few days.
• Use short wicks — The shorter the distance between reservoir and plant, the better the wicking action. Keep the height difference minimal.

Frequently Asked Questions

What is wick system hydroponics?

The Wick System is the simplest hydroponic method in existence. Wicks made of cotton rope, nylon cord, or felt strips draw nutrient solution up from a reservoir into the growing media by capillary action, keeping the root zone consistently moist. It requires no pumps, no electricity, and no moving parts. It is even simpler than the Kratky Method because the plant does not sit directly over the reservoir, giving you more flexibility in how you arrange your containers.

How much does a wick system cost to build?

A wick system is one of the cheapest hydroponic setups you can build, often costing under $15-25 for a basic setup. You need two containers that can stack or sit at different heights, some cotton rope or nylon cord for wicks, growing media like a perlite and vermiculite mix or coco coir, and hydroponic nutrients. A cut 2-liter bottle works great as a starter container. Adding a pH and EC meter brings the total to around $50-70.

What are the best crops for wick systems?

Wick systems work best with small, low-water-demand plants. Herbs like basil, parsley, chives, and oregano are ideal. Microgreens are quick-growing and light-feeding, making them a perfect fit. Small-head lettuce varieties like butterhead, baby greens such as arugula, watercress, and baby spinach, and even small ornamental houseplants thrive in wick setups. Avoid large or thirsty plants because the wick cannot deliver nutrients fast enough for heavy feeders like tomatoes and peppers.

Is a wick system good for beginners?

The wick system is perfect for absolute beginners, small spaces, classrooms, and anyone who wants a no-maintenance introduction to growing without soil. There are no pumps to set up, no timers to program, and no electricity required. The concept is straightforward and nearly impossible to get wrong. It is an excellent way to learn the basics of hydroponics, including nutrient mixing and pH management, before moving on to more advanced systems.

How often do I need to maintain a wick system?

Wick systems require very little maintenance. The main task is checking the reservoir every few days to make sure it has not run dry, since dry wicks stop working and need to be re-soaked to resume capillary action. Use 2-3 wicks per plant for reliable moisture delivery and redundancy in case one wick dries out or gets blocked. Keep the height difference between the reservoir and growing container minimal, as shorter wicks provide better wicking action. Beyond that, occasional pH checks and nutrient solution top-offs are all that is needed.