Advanced Schlumbergera Cultivation: Environment Control and Commercial Production

Environmental Control for Schlumbergera

Understanding the Native Environment

To optimize cultivation, we must understand Schlumbergera's natural habitat:

Brazilian Cloud Forest Conditions:

• Elevation: 1,000-1,700 m
• Temperature: 60-70°F (15-21°C) average
• Humidity: 70-85% typical
• Light: Filtered through forest canopy
• Rainfall: Seasonal, with dry periods
• Air movement: Constant, gentle breezes

Light Management

Light Intensity Requirements:

• Optimal: 10,000-15,000 lux
• Minimum for health: 5,000 lux
• Maximum (risk of stress): 25,000 lux

Daily Light Integral (DLI):

• Vegetative growth: 6-10 mol/m²/day
• Flower initiation: 4-8 mol/m²/day (reduced)
• Avoid high DLI during flower initiation

Photoperiod Control:

For programmed flowering, precise photoperiod control is essential:

• Short-day threshold: ~11 hours critical daylength
• Effective dark period: 12-14 hours continuous
• Light interruption sensitivity: Very high
• Even brief light exposure (seconds) can delay flowering

Supplemental Lighting:

• Useful for growth, counterproductive for flowering
• Full-spectrum LED preferred
• Use only during vegetative period

Temperature Management

Growth Phase:

• Day: 68-77°F (20-25°C)
• Night: 60-65°F (15-18°C)
• DIF (Day-Night Difference): +8-12°F beneficial

Flower Initiation:

• Day: 60-65°F (15-18°C)
• Night: 45-55°F (7-13°C)
• Cool nights more important than cool days

Temperature and Photoperiod Interaction:

Humidity Control

Optimal Range: 50-70% RH

By Growth Stage:

• Vegetative: 50-60% adequate
• Flower initiation: 50-60%
• Bud development: 60-70%
• Blooming: 50-60%

Low Humidity Effects:

• Bud drop
• Wilting
• Spider mite favor

High Humidity Effects:

• Fungal disease risk
• Botrytis on flowers
• Poor transpiration

Substrate and Nutrition

Advanced Growing Media

Commercial Production Mix:

• 50% peat moss (or peat-free alternative)
• 30% perlite
• 20% pine bark fines
• pH adjusted to 5.5-6.2

High-Performance Mix:

• 40% coconut coir
• 25% perlite
• 20% orchid bark
• 10% horticultural charcoal
• 5% worm castings

Physical Properties Target:

• Air-filled porosity: 15-25%
• Water-holding capacity: 40-50%
• Bulk density: 0.2-0.4 g/cm³

Fertility Programs

Vegetative Growth (Spring-Summer):

• N-P-K ratio: 20-10-20 or 20-20-20
• EC: 1.0-1.5 mS/cm
• Application: Every 2 weeks

Flower Initiation (Fall):

• Reduce nitrogen
• N-P-K ratio: 10-30-20
• EC: 0.8-1.2 mS/cm
• Promotes bud development

Bloom Period:

• Minimal fertilization
• Light 10-10-10 if needed
• Resume after bloom

Micronutrients:

• Iron essential for green color
• Magnesium prevents chlorosis
• Include complete micronutrient package

pH and EC Management

Optimal Substrate pH: 5.5-6.2

Monitoring:

• Test leachate regularly
• Maintain consistent feeding solution pH
• Adjust with acid (if high) or lime (if low)

EC Targets:

• Leachate EC: 1.0-2.0 mS/cm
• Higher EC can cause salt damage
• Flush periodically

Programmed Flowering Production

Commercial Scheduling

For specific market dates, work backward:

Timeline Example (Christmas Sales):

Short-Day Treatment Methods

Blackout Cloth:

• Automatically applied/removed
• Provides 13-14 hours darkness
• Must be complete—no light leaks

Night Interruption Alternative:

• Not used for Schlumbergera
• Unlike some crops, they need continuous darkness

Cool Temperature Method:

• Maintain 50-55°F (10-13°C) constant
• Flowers regardless of photoperiod
• Energy-intensive but effective

Height Control

Mechanical:

• Pinching creates branching
• Multiple pinches create compact shape
• Timing affects flower count

Environmental:

• DIF (cool days, warmer nights) reduces stretch
• Lower temperatures generally reduce internode length

Chemical (if permitted):

• PGRs can control height
• Consult regulations and recommendations
• Often unnecessary with proper cultural control

Commercial Propagation

Cutting Production

Stock Plant Management:

• Maintain vegetatively
• Optimal growing conditions
• Regular pinching for cutting production
• Pest and disease monitoring

Cutting Specification:

• 2-3 segments per cutting
• Healthy, turgid material
• No flowers or buds
• Free of pests/disease

Rooting Systems

Plug Production:

• 72-cell or 50-cell trays
• One cutting per cell
• Rooting medium: peat-perlite mix

Rooting Conditions:

• Temperature: 70-75°F (21-24°C)
• Humidity: 80-90% (mist or fog)
• Light: Moderate (reduce if wilting)
• Duration: 3-4 weeks to root

Rooting Hormone:

• IBA at 500-1000 ppm
• Dip or spray application
• Improves uniformity

Production Timeline

Pest and Disease Management

Integrated Pest Management

Monitoring:

• Weekly scouting
• Yellow sticky cards for flying insects
• Indicator plants

Major Pests

Mealybugs:

• Most common pest
• Hide in stem axils
• Biological: Cryptolaemus lady beetle
• Chemical: Insecticidal soap, systemic insecticides

Scale:

• Soft scale most common
• Check stems and undersides
• Treatment similar to mealybugs

Fungus Gnats:

• Indicate overwatering
• Larvae damage roots
• Biological: Steinernema nematodes, Hypoaspis mites
• Cultural: Reduce moisture

Spider Mites:

• Favored by low humidity
• Check undersides of segments
• Biological: Phytoseiulus predatory mites
• Cultural: Increase humidity

Disease Management

Root and Stem Rots (Pythium, Phytophthora, Fusarium):

• Prevention: Well-draining media, proper watering
• Treatment: Fungicide drenches
• Remove affected plants immediately

Botrytis:

• Gray mold on flowers
• Favored by high humidity, poor air flow
• Prevention: Air circulation, avoid wetting flowers
• Treatment: Fungicides as preventive

Bacterial Soft Rot:

• Slimy, foul-smelling decay
• No chemical control
• Prevention: Sanitation, avoid wounds
• Remove infected material

Quality Standards

Grading Criteria

Shipping Considerations

• Ship before full bloom (bud stage)
• Protect from temperature extremes
• Sleeve to prevent breakage
• Minimize time in box

Conclusion

Advanced Schlumbergera cultivation combines precise environmental control with understanding of the plant's physiology. Commercial production requires careful scheduling, consistent environmental management, and rigorous pest and disease prevention. Whether producing for wholesale markets or refining techniques for exceptional personal collection plants, mastering these advanced methods results in superior quality specimens with abundant, reliable flowering.