How to Grow Nannochloropsis
Nannochloropsis
Nannochloropsis oculata
algaeNannochloropsis is a single-celled marine microalgae rich in omega-3 fatty acids, proteins, and nutrients. It is cultivated primarily for nutritional supplementation, aquaculture feed, and biofuel production. This microscopic organism thrives in saltwater environments and requires specific culturing conditions.
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Example Nannochloropsis timeline · Pittsburgh, PA (Zone 6b)
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Plant Nannochloropsis
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Nannochloropsis
Around Apr 24≈ 7 days after planting
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Growing Conditions
Soil
Growth Stages
Inoculation & Lag Phase
1-3 daysCulture is inoculated with starter cells; organisms acclimate to medium with minimal visible growth
Maintain sterile conditions; avoid contamination from other microorganisms; keep temperature stable at 18-24°C
Exponential Growth Phase
5-10 daysCell density increases rapidly; medium gradually becomes cloudy and develops greenish coloration
Ensure consistent light (14-16 hours daily); maintain aeration or gentle mixing; monitor pH daily; keep temperature between 20-25°C
Stationary Phase
2-5 daysGrowth rate slows as nutrient depletion begins; cell density plateaus; color deepens to darker green
Monitor nutrient levels; consider partial medium changes or nutrient supplementation if continuing culture; maintain light and aeration
Harvest Ready
Harvest window: 1-2 daysCulture reaches desired cell density (typically 1-5 million cells/mL); medium is turbid and rich green
Verify cell count via hemocytometer or spectrophotometer; harvest before stationary phase ends to maintain vitality
Decline Phase
3-7 days onwardsIf not harvested, cells begin dying as nutrients are exhausted and waste accumulates
Harvest promptly to avoid culture collapse; if continuing, perform a full medium change and re-inoculate fresh culture
Companion Planting
Plan your garden →Common Pests
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Maintain strict sterile technique; autoclave media and equipment; use antibiotic-free medium or antibiotics if needed; keep culture pH and temperature stable
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Work in laminar flow hood or use aseptic technique; cover culture vessels loosely to allow gas exchange while blocking spores; discard contaminated cultures
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Start with pure strain from reputable source; maintain pH and salinity within narrow ranges; use species-specific growth conditions that favor Nannochloropsis
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Prevent entry via non-sterile water or air; use filtered, pasteurized medium; maintain pH below 8.0 which discourages grazers
Uses
Nutritional supplement and superfood
CulinaryNannochloropsis is dried and powdered for addition to smoothies, foods, and supplements. It is prized as a vegan source of EPA (eicosapentaenoic acid), an omega-3 fatty acid, as well as protein, vitamins (B12, A), and minerals. [source]
Aquaculture & aquarium feed
CulinaryLive or dried cultures are fed to fish larvae, shrimp, mollusks, and copepods in hatcheries and aquaculture systems. Its small size and nutrient density make it ideal for filter-feeding organisms. [source]
Omega-3 fatty acid source
MedicinalNannochloropsis contains EPA and DHA precursors, supporting cardiovascular and neurological health. It is used in nutraceutical products and supplements marketed as alternatives to fish oil. [source]
Biofuel and biodiesel production
HouseholdNannochloropsis accumulates lipids that can be converted into biodiesel. Research is ongoing into scaling production for sustainable renewable energy. [source]
Cosmetics and skincare
CraftAlgae-derived compounds are incorporated into moisturizers, masks, and anti-aging products for their antioxidant and hydrating properties. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Harvest when cell density reaches 1-5 million cells/mL (typically 7-14 days after inoculation). Use spectrophotometry (OD680) or hemocytometer for accurate counting. Centrifuge culture at 3,000-5,000 g for 10-15 minutes to concentrate cells. Dry harvested biomass at 60-80°C or store wet paste at 4°C for 1-2 weeks. For continuous harvest, remove 10-30% of culture every 2-3 days and replenish with fresh medium.
Fun Facts
- 🌱 Nannochloropsis cells are only 2-4 micrometers in diameter—invisible to the naked eye—yet collectively they can produce enough biomass to yield 40-50% of their dry weight in lipids under stress conditions.
- 🌱 Unlike many microalgae, Nannochloropsis is naturally marine and halotolerant, making it resistant to contamination in high-salinity cultures where most bacteria cannot survive.
- 🌱 The name 'Nannochloropsis' derives from Greek: 'nanno' (dwarf) + 'chloro' (green) + 'opsis' (appearance), reflecting its diminutive size and photosynthetic nature.
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