Hydroponic strawberries grown in a drip system offer superior flavor, cleanliness, and yield compared to field-grown berries. This recipe is designed for day-neutral (everbearing) varieties that produce fruit continuously rather than in a single seasonal flush, making them ideal for indoor and greenhouse hydroponic operations.
The drip system delivers precise nutrient doses directly to the root zone in a coco coir or perlite substrate, allowing excellent oxygen availability while maintaining consistent moisture. Strawberries are moderate feeders with specific calcium and potassium demands during fruiting — this recipe carefully balances these nutrients to produce firm, sweet berries with deep red color and outstanding shelf life.
A critical aspect of hydroponic strawberry production is managing the plant's reproductive cycle. By manipulating photoperiod and nutrient ratios, you can encourage continuous flowering and fruiting. This recipe includes a runner management protocol that redirects energy from vegetative spreading into fruit production, increasing berry yield by 40-60% over unmanaged plants.
Recipe for Strawberry in drip. NPK target: 120-20-200 ppm. Optimal pH: 5.8; EC: 1.6 mS/cm. Duration: 75 days.
Fertilizer ingredients:
1. 4 ml/L Canna Coco A by Canna. Concentration: 5-0-3. Notes: Part A of two-part coco-specific formula — always use equal parts A and B
2. 4 ml/L Canna Coco B by Canna. Concentration: 0-4-2. Notes: Part B — never mix concentrates together before diluting in water
3. 1.5 ml/L Canna PK 13/14 by Canna. Concentration: 0-13-14. Notes: Potassium-phosphorus booster for fruit development and sweetness
4. 3 ml/L CalMag by Botanicare. Concentration: 2-0-0 (Ca 3.2%, Mg 1.2%). Notes: Essential for strawberry fruit firmness and preventing grey fruit
5. 2.5 ml/L Cannazym by Canna. Concentration: Enzyme complex. Notes: Breaks down dead root material and improves nutrient uptake
Mixing instructions:
Step 1: Prepare Drip System and Growing Medium. Set up drip irrigation lines with pressure-compensating emitters spaced for each plant position (12-inch spacing). Fill grow bags or pots with a 70/30 coco coir and perlite mix, pre-buffered with CalMag solution (EC 0.5) to prevent calcium lockout. Flush the coco mix with the CalMag solution twice before planting, allowing 20% runoff each time. Duration: 2 hours. Tips: Pre-buffering coco coir is critical — unbuffered coco holds calcium and releases sodium/potassium Use pressure-compensating emitters to ensure even delivery across all plants Aim for 4-6 drip events per day in coco, adjusted based on runoff EC
Step 2: Plant Strawberry Starts or Bare Root Crowns. Plant bare root strawberry crowns or established plugs into the prepared coco medium. Position the crown (the thick part between roots and leaves) exactly at the surface level — burying the crown causes rot, while exposing roots causes desiccation. Water in immediately with quarter-strength nutrient solution. Ensure drip emitters are positioned 1-2 inches from the crown. Duration: 30 minutes per tray. Tips: Day-neutral varieties (Albion, San Andreas) are best for hydroponic production Trim any dead or brown roots before planting — only healthy white roots should remain Place emitters slightly away from the crown to prevent crown rot
Step 3: Establish Vegetative Growth and Root System. For the first 3-4 weeks, focus on establishing a strong root system and crown. Run drip cycles 4-5 times daily for 2-3 minutes each, maintaining 10-20% runoff. Keep nutrient solution at seedling/early veg strength (EC 0.8-1.2 mS/cm). Remove all flower trusses during this establishment period — this forces energy into root and crown development. Duration: 3-4 weeks. Tips: Removing early flowers is painful but critical — it doubles yield later Monitor runoff EC: if it's much higher than input EC, the medium is accumulating salts Roots should be white and extensive by the end of week 4
Step 4: Transition to Flowering and Fruiting Nutrients. After the establishment period, allow flowers to develop. Transition to a lower-nitrogen, higher-potassium feeding regimen. Increase EC gradually to 1.4-1.8 mS/cm. Reduce nitrogen to 100 ppm and boost potassium to 200+ ppm. Introduce Canna PK 13/14 once fruitlets appear. Maintain calcium at 160+ ppm for firm fruit. Duration: Ongoing. Tips: Potassium drives sugar accumulation (Brix) — higher K = sweeter berries Monitor leaf color: slight yellowing of older leaves during fruiting is normal If fruit is soft and watery, increase calcium and reduce watering frequency
Step 5: Pollinate and Manage Runners. Indoor strawberries need manual pollination. Use a small paintbrush or electric toothbrush to gently transfer pollen between flowers daily when fully open (petals reflexed back, stamens visible). Cut all runners as they appear — runners divert 30-40% of plant energy away from fruit production. Redirect this energy into flowers and berries. Duration: 5 minutes daily. Tips: Unpollinated or poorly pollinated flowers produce misshapen, seedy berries Pollinate each flower 2-3 times over consecutive days for best results Save runners only if you want to propagate new plants
Step 6: Harvest and Maintain Continuous Production. Harvest berries when 90-100% red — they do not ripen further after picking. Gently twist or cut the stem above the calyx (green cap). Day-neutral varieties produce in waves, with a new flush every 4-6 weeks. Between flushes, reduce EC slightly (1.2-1.4 mS/cm) and maintain vegetative nutrients to support new flower truss development. Duration: Ongoing every 2-3 days. Tips: Early morning harvest yields berries with best flavor and longest shelf life Don't wash berries until ready to eat — moisture promotes mold A healthy plant produces fruit for 6-12 months before needing replacement
Weekly schedule:
Week 1: Set up drip system and pre-buffer coco coir Plant strawberry starts/crowns Begin light feeding at seedling strength Remove all flower trusses Notes: EC 0.6-0.8 mS/cm. Focus on establishment. Remove flowers for 3-4 weeks.
Week 2: Monitor root establishment Increase feeding frequency to 4-5 drip events/day Check runoff EC and pH Continue removing flower trusses Notes: EC 0.8-1.0 mS/cm. Roots should be emerging from the bottom of containers.
Week 3: Full vegetative nutrient strength Remove runners as they appear Continue removing flower trusses Full nutrient solution change Notes: EC 1.0-1.2 mS/cm. Strong vegetative growth. Crown should be thick and vigorous.
Week 4: Allow flowers to develop from this point Begin transition to bloom nutrients Reduce nitrogen, increase potassium Set up pollination routine Notes: EC 1.2-1.4 mS/cm. First allowed flowers opening. Begin pollination.
Week 5: Active pollination of open flowers Introduce PK booster as fruitlets appear Cut runners Monitor fruit development Notes: EC 1.4-1.6 mS/cm. Green fruitlets forming from pollinated flowers.
Week 6: Full fruiting nutrient strength Support heavy fruit trusses if needed Continue pollinating new flowers Monitor for botrytis (grey mold) Notes: EC 1.6-1.8 mS/cm. Fruits coloring up. Keep humidity below 65% to prevent mold.
Week 7: Begin harvesting ripe berries Maintain fruiting nutrients Continue pollination for successive flushes Remove any diseased fruit immediately Notes: EC 1.6-2.0 mS/cm. First harvest! Berries should be firm, sweet, and fully red.
Week 8: Continue harvesting every 2-3 days Slight EC reduction between flushes Clean drip emitters Prepare for next fruiting wave Notes: EC 1.4-1.6 mS/cm. Between flushes — maintain moderate feeding for next flower truss development.
Nutrient stages in ppm:
seedling: N 60, P 25, K 70.
vegetative: N 140, P 40, K 150.
flowering: N 100, P 80, K 200.
fruiting: N 80, P 60, K 230.
Temperature target: 72/60 C. Humidity: 50-65%. Light schedule: 14 hours per day.
Tags: strawberry, drip, drip irrigation, intermediate, hydroponic, fruiting, canna, coco coir