Which plants aren't suitable for hydroponics?
Written by
Olivia Mitchell
Reviewed by
Prof. Samuel Fitzgerald, Ph.D.While hydroponics can work for a selection of crops, many plants present special difficulties in soilless systems. Plants that require long roots, seasonal dormancy, or specific extreme acid-alkaline conditions find it difficult to adapt. Understanding this phase of the subject will prevent many costly failures and guide the selection of a plant best suited to the system.
Root System Issues
- Trees and shrubs need deep soil penetration impossible in shallow systems
- Tubers like potatoes require loose soil for proper formation
- Carrots and parsnips develop deformed roots in confined spaces
Growth Cycle Challenges
- Bulb plants like tulips demand cold dormancy periods
- Perennial herbs needing seasonal dieback disrupt continuous systems
- Biennials requiring vernalization complicate crop rotation
Environmental Mismatches
- Blueberries needing pH 4.0-5.0 conflict with standard solutions
- Cacti and succulents requiring dry periods between watering
- Large fruiting plants like pumpkins needing ground support
I attempted to grow artichokes using hydroponics, but I was not satisfied with the results. Their extensive root system overran the NFT channels, and their height required constant staking. Changing the crop to peppers and cucumbers allowed me to increase production levels dramatically with the same resources.
Concentrate on growing plants that grow naturally well in hydroponic systems. Many leafy greens, herbs, tomatoes, and peppers will do quite well in a regulated growing medium. These crops can be harvested more quickly and thrive in rows than in traditional outdoor gardening.
Consider aeroponics as an option for challenging crops, as high-pressure mist systems are available that accommodate larger root zones. I have seen sweet potatoes grown successfully in tower-based aeroponics systems. However, the initial setup costs were significantly higher than those of standard hydroponics systems.
Accepting these limitations improves overall success rates. Matching crops to appropriate systems prevents frustration. Your hydroponic investment yields the best returns when focusing on plants genetically adapted to soilless cultivation.
Read the full article: Hydroponic Nutrient Solutions: The Complete Guide
