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:

Night Temp	Dark Period Needed
50°F (10°C)	Flowers regardless of photoperiod
55°F (13°C)	10-11 hours darkness
60°F (15°C)	12-13 hours darkness
65°F (18°C)	14+ hours darkness
70°F (21°C)	May not flower

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):

Weeks Before Sale	Activity
12-14	Begin pinching for shape
10-12	Last pinch
8-10	Begin short-day/cool treatment
6-8	Continue treatment, buds visible
4-6	Move to finishing house
2-4	Full color developing
0	Sale

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

Stage	Duration	Notes
Rooting	3-4 weeks	In propagation area
Transplant	Week 5	To finish container
Vegetative	12-20 weeks	Growth and pinching
Flower initiation	6-8 weeks	Short-day/cool treatment
Finishing	4-6 weeks	Color development
Total	30-44 weeks	Cutting to sale

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

Grade	Criteria
Premium	Symmetrical shape, 20+ buds/blooms, no defects
Standard	Good shape, 12-20 buds/blooms, minor defects
Economy	Acceptable shape, 8-12 buds/blooms, some defects

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.