Aquaponics herbs are among the best crops you can grow with fish. Basil, mint, parsley, cilantro, chives and watercress have low nutrient needs, grow quickly at the aquaponics pH of about 6.8–7.0, and can be cut again and again. Research at the University of the Virgin Islands found culinary herbs earned far more per square foot than fruiting crops. Basil is the star: it likes warm water (above about 70°F) and is ready to start cutting about 5–6 weeks after transplanting. Mint and other vigorous herbs need room because their roots can clog pipes.
Key takeaway: Grow aquaponics herbs in media beds or rafts, match warm-season herbs (basil) and cool-season herbs (parsley, cilantro) to your water temperature, harvest often, and keep mint out of narrow NFT pipes.
| Herb | Best temp | Time to first harvest | Best system |
|---|---|---|---|
| Basil | 68–77°F | 5–6 weeks from transplant | Media bed, NFT, raft |
| Parsley | 59–77°F | 20–30 days after transplant | Media bed, NFT, raft |
| Cilantro | Cool | About 4–6 weeks | Raft, media bed |
| Mint | Mild | A few weeks once rooted | Media bed (big roots) |
| Chives | Mild | Weeks after transplant | Media bed, raft |
| Watercress | Cool | A few weeks | Raft, media bed |
Why Aquaponics Herbs Pay Off
SRAC’s aquaponics fact sheet says culinary herbs are the best choice for income per unit area per unit time because they grow rapidly and command high prices. It names basil, cilantro, chives, parsley, portulaca and mint as examples. In UVI’s commercial-scale system, basil production was 11,000 pounds a year, valued at $110,000, compared with 6,400 pounds of okra worth $6,400. Data from a UVI-style system in Alberta, Canada, suggested herbs could gross more than 20 times as much as tomatoes and cucumbers per area, though SRAC cautions that these extrapolated figures don’t include capital, operating and marketing costs.
Herbs also suit beginners. The FAO lists basil, mint, parsley, coriander (cilantro), chives and watercress among low-nutrient-demand plants, so a modest fish load can support them. See fish to plant ratio.
Basil in Aquaponics
The FAO’s crop profile gives basil a pH of 5.5–6.5, spacing of about 6–10 inches, germination in 6–7 days at 68–77°F, and a growth time of 5–6 weeks before harvest starts at about 6 inches tall. Harvest can continue for 30–50 days. Basil grows best warm; above about 81°F, the FAO recommends ventilation or 20% shade cloth to prevent tip burn. Keeping water above about 70°F day and night helps reduce disease stress. Pinch flower tips to keep leaves sweet and plants bushy.
See growing basil, pruning basil and Thai basil.
Parsley, Cilantro and Other Cool Herbs
The FAO notes parsley is easy to grow because its nutrient needs are low, but germination is slow: 2–5 weeks depending on seed freshness. Soak seed in warm water for 24–48 hours first. Parsley grows from about 46°F and needs partial shade above about 77°F. Harvest outer stalks once they reach about 6 inches, which keeps the plant producing.
Cilantro prefers cool water and bolts in heat; sow small batches every few weeks. See growing cilantro and cilantro bolting. Chives and watercress are also low-maintenance. See watercress.
Mint and Vigorous Herbs
Mint grows easily from cuttings, but the FAO warns that tomatoes and mint have massive root systems that can clog even large NFT pipes. Grow mint in media beds or a dedicated raft section, and trim roots between harvests. Lemon balm and oregano behave similarly. See growing mint.
How to Grow Aquaponics Herbs Step by Step
- Pick herbs for your season. Warm water: basil. Cool water: parsley, cilantro, chives, watercress.
- Start seeds or cuttings in plugs. See aquaponics seedlings.
- Transplant basil at 4–5 true leaves, as the FAO suggests.
- Space plants 6–12 inches apart, wider for mint.
- Light well. Most herbs want full sun or strong LEDs. See how much light herbs need.
- Harvest often, cutting above a leaf pair so stems branch.
- Replace plants when they turn woody or bolt.
Nutrients and Common Problems
- Pale new leaves: add chelated iron. See aquaponics iron deficiency.
- Black or bruised basil leaves: handling damage or cold. See basil leaves turning black.
- Yellowing basil: see basil yellow leaves.
- Fungal disease: the FAO lists Fusarium wilt, gray mold and black spot in basil under poor temperature and high humidity. Improve airflow.
- Pests: aphids, whiteflies and mites. See aquaponics pest control.
Best Aquaponics Herbs Ranked for Beginners
| Rank | Herb | Why |
|---|---|---|
| 1 | Basil | Fast, high value, loves warm water |
| 2 | Mint | Nearly unkillable; grows from cuttings |
| 3 | Chives | Low care, regrows after cutting |
| 4 | Parsley | Low nutrient need; slow start |
| 5 | Watercress | Loves moving water |
| 6 | Cilantro | Fast, but bolts in heat |
Selling Aquaponics Herbs
Herbs have a short shelf life, which SRAC notes helps local growers compete with shipped produce. Restaurants and farmers markets often want consistent weekly supply, so stagger plantings. Pesticide-free production is a selling point, since aquaponics rules out pesticides. Check local food rules before selling. See selling to restaurants and value-added herb products.
Feeding Rate for Aquaponics Herbs
The FAO’s feed rate ratio for leafy greens, 40–50 grams of fish feed per square meter of grow bed per day, also works for most aquaponics herbs because they have similar low nutrient needs. A 2×4 foot bed (about 0.75 square meters) needs only about 30–38 grams of feed a day, which a small tank of goldfish or a few tilapia can supply. Basil grown heavily for sale can draw down nitrogen faster; the FAO notes basil’s higher nitrogen uptake, so watch for pale growth and avoid depleting the water.
Growing Aquaponics Herbs Indoors
Indoor aquaponics herbs do well in a 10–40 gallon aquarium system with a media tray on top and an LED grow light for 14–16 hours. Basil, mint, chives and parsley are good choices because they stay compact with regular cutting. Keep the room above about 65°F for basil, run a small fan for airflow, and cut stems often so plants don’t shade each other. See aquarium aquaponics and DIY indoor aquaponics system.
FAQs
What are the best aquaponics herbs?
Basil, mint, chives, parsley, watercress and cilantro.
Does basil grow well in aquaponics?
Yes; it’s one of the most popular aquaponic crops.
Can mint clog my system?
Yes; its roots can block NFT pipes, so use media beds.
Why won’t my parsley germinate?
Parsley is slow; soak seed 24–48 hours and wait up to five weeks.
Are herbs profitable in aquaponics?
SRAC data show herbs earn far more per area than fruiting crops.
Can I grow herbs indoors with fish?
Yes, with good grow lights.
Sources
- FAO — Small-scale aquaponic food production
- Southern Regional Aquaculture Center — SRAC 454: Aquaponics—Integrating Fish and Plant Culture
- Clemson Cooperative Extension — Basil
- Photo credits (Wikimedia Commons, edited with titles): Ocimum Basilicum leaf lighted by the left by BernaBotto (CC BY-SA 4.0); Plant of mint 2025 by Learner eyes (CC BY-SA 4.0); Basil plant in a pot 02 by Netha Hussain (CC BY-SA 4.0); Deepwater Aquaponics Floating Rafts Growing Lettuce, Basil and Arugula by Alabama Extension (CC0); Coriander Green Seeds (Coriandrum sativum) in Shimla by Sapna Sony (CC BY-SA 4.0)