Left Continue shopping
Your Order

You have no items in your cart

You might like
FREE Shipping on orders $20 or more!

How To Grow Spinach Hydroponically

How To Grow Spinach Hydroponically

Jeena Lugo Jeena Lugo
6 minute read

Spinach is a cool-weather crop that is easy to grow hydroponically using a nutrient solution. Hydroponics is a soilless growing method that provides plants with all the necessary nutrients for healthy growth. In this article, we will discuss how to grow spinach hydroponically and the benefits of this growing method.

Choosing Spinach Seeds and Seedlings

Before starting the hydroponic setup, choose the excellent spinach seed variety for hydroponic growing. Look for disease-resistant spinach seeds that are quick to mature, producing abundant leaves. 

Bloomsdale Spinach Seeds

Bloomsdale Spinach Seeds


Bloomsdale Spinach Seeds For Planting Is A Great Heirloom, Non-GMO Vegetable Variety TRUSTED VARIETY - Popular spinach seeds used by gardeners for years. Produces dense, deep green leaves packed full of taste and nourishment. INDOOR & OUTDOOR GARDEN - Spinach… read more

Preparing the Hydroponic System

The nutrient film technique (NFT) system is an ideal hydroponic setup for growing spinach. It uses a shallow tray with a nutrient solution to give plants water and nutrients. Before planting the seedlings, clean and sterilize the NFT tray, tubing, and pump with a mild bleach solution.

Planting Spinach Seedlings

Plant the spinach seedlings in the NFT tray, ensuring the roots are suspended in the nutrient solution. Place the seedlings in net cups with growing mediums like rock wool, vermiculite, or perlite. The medium should hold the plants upright and allow adequate airflow to the roots.

Feeding Your Spinach Plants

Hydroponic spinach plants require a nutrient solution with a pH between 6.0 and 7.0. Test the pH regularly using a pH meter or paper strips and adjust as necessary. If the pH is too high, add a few drops of phosphoric acid. If it's too low, add potassium hydroxide.

Spinach plants also require at least 12 hours of light per day. If the natural light is insufficient, supplement with grow lights. Fluorescent lighting is suitable for spinach as it emits the required spectrum of light for plant growth. Place the grow lights about 6 inches above the plants and adjust their height as they grow taller.

Harvesting Hydroponic Spinach

Spinach plants are easy to harvest once they reach maturity. The ideal time to reap is when the leaves are 4-6 inches long, and the plants are about 6-8 weeks old. To avoid leaf tip burn, only pick the plant's outer leaves, leaving the inner ones to continue growing. Use scissors or a sharp knife to cut the leaves about 1 inch above the crown.

Benefits of Growing Hydroponic Spinach

Growing spinach hydroponically offers several benefits over traditional soil-based growing methods. Firstly, hydroponic systems use up to 90% less water than soil-based systems, making them more water-efficient and environmentally friendly. Secondly, hydroponic systems eliminate soil-borne diseases and pests, minimizing the need for pesticides and fungicides. Thirdly, hydroponic setups can be used year-round, irrespective of the climate or season, allowing for continuous crop production. Finally, hydroponic systems are easy to set up, use less space than traditional gardens, and can be adapted to different plant species.

Lettuce Seed Assortment | 5 Variety Pack

Lettuce Seed Assortment | 5 Variety Pack


Lettuce and Greens Heirloom Vegetable Seed Non-GMO Seeds for Planting Indoors and Outdoor 5 Packs - Buttercrunch, Romaine, Arugula, Kale, and Spinach 5 VARIETIES GREENS AND LETTUCE SEED PACKETS - 5 of our most popular salad greens, including Arugula (Roquette),… read more


Growing spinach hydroponically is an easy and rewarding way to produce fresh, healthy greens year-round. You can grow spinach without soil by choosing the right seeds or seedlings, setting up the hydroponic system, feeding the plants with a nutrient solution, and providing adequate light. Hydroponic spinach is more water-efficient, disease-free, and easy to harvest than soil-based plants. So, if you're looking for a leafy green that is easy to grow and harvest, consider spinach hydroponics. You can enjoy a bountiful harvest of this nutritious and delicious green with a little effort and care.

In conclusion, growing spinach hydroponically is an excellent way to produce fresh and healthy greens with minimal effort and resources. Following this article's tips, you can successfully grow spinach using a nutrient solution and the NFT system. Hydroponic spinach has many advantages over soil-based plants, such as reduced water usage, a disease-free growing environment, and year-round crop production. Plus, spinach is a nutritious leafy green that is versatile in cooking and can be used in salads, smoothies, and other dishes. So why not try hydroponic spinach and enjoy the benefits of this easy and sustainable growing method? Now that you know how to grow spinach hydroponically, will you give it a shot?

We also sell a large variety of spinach and green seeds that are great for hydroponic growing.


Q: Is it challenging to grow spinach hydroponically?

A: No, it is relatively easy to grow spinach hydroponically with the right seeds, nutrients, and setup. Plus, hydroponic systems eliminate soil-borne diseases and pests, making it a more reliable and efficient growing method.

Q: How long does it take for hydroponic spinach to mature?

A: Hydroponic spinach plants typically reach maturity in 6-8 weeks, depending on the variety and growing conditions. You can harvest the leaves when they are 4-6 inches long.

Q: What is the ideal pH level for hydroponic spinach?

A: The ideal pH level for hydroponic spinach is between 6.0 and 7.0. Test the pH level regularly and adjust it with a pH meter or paper strips.

Salad Greens Lettuce Seed Assortment | 10 Variety Pack

Salad Greens Lettuce Seed Assortment | 10 Variety Pack


Introducing the Salad Greens Lettuce Seeds Heirloom Vegetable Seed Pack by Gardeners Basics, containing 23,000 premium, non-GMO lettuce seeds. This pack includes 10 varieties of salad greens, including Buttercrunch, Romaine, Iceberg, and more, offering a range of leaf and head… read more

Q: Do I need to use fertilizers in hydroponic spinach growing?

A: You need to use fertilizers in growing hydroponic spinach to provide the plants with the nutrients for healthy growth. Use a complete nutrient solution that contains all the required minerals and adjust the strength according to the growth stage.

Q: How often should I change the nutrient solution in my hydroponic system?

A: It's best to change the nutrient solution in your hydroponic system every 2-3 weeks to prevent nutrient depletion and algae and bacteria buildup. Clean the system before refilling it with a new solution.

Q: Can I reuse the growing medium in hydroponic spinach growing?

A: You can reuse the growing medium in hydroponic spinach by washing and sterilizing it between plantings. Use a mild bleach solution to kill bacteria, and rinse thoroughly before using it again.

Q: Can I grow other plants alongside spinach in the same hydroponic system?

A: You can grow other plants alongside spinach in the same hydroponic system if they have similar nutrient and light requirements. Avoid overcrowding the system and monitor the pH and nutrient levels regularly.

I hope this FAQ section helps answer some common questions about growing spinach hydroponically. If you have any other questions, feel free to ask.

« Back to Blog