Tea is a perennial plantation crop that requires year-round care. Unlike seasonal crops, tea bushes continuously produce new shoots, making regular nutrient management and disease prevention essential for maintaining productivity and leaf quality.

Many tea growers apply bio-inputs only after problems appear. However, the best results are achieved when biofertilizers, biofungicides, and biopesticides are applied preventively throughout the year. Beneficial microorganisms establish themselves around the root zone, improve soil fertility, suppress diseases, and naturally control insect pests before major damage occurs.

The following annual schedule is a general guide that can be adjusted according to local climate, rainfall, irrigation, pruning schedule, and pest pressure.

Bio-inputs Used in Tea Plantation

Biofertilizers

• Azotobacter
• Phosphate Solubilizing Bacteria (PSB)
• Potash Mobilizing Bacteria (KMB)
• Zinc Solubilizing Bacteria (ZSB)
• Silicon Solubilizing Bacteria (SSB)
• NPK Consortia

Biofungicides

• Trichoderma spp.
• Pseudomonas fluorescens
• Bacillus subtilis

Biopesticides

• Beauveria bassiana
• Metarhizium anisopliae
• Verticillium lecanii
• Bacillus thuringiensis (BT)

Annual Bio-input Calendar for Tea Plantation

January – February (Post-Pruning Recovery)

Objective

• Root regeneration
• Disease prevention
• Faster vegetative recovery

Recommended Products

• Trichoderma
• Pseudomonas fluorescens
• Bacillus subtilis
• Azotobacter
• PSB

Expected Benefits

• Healthy root regeneration
• Reduced fungal infection
• Faster new shoot development

March – April (Vegetative Growth)

Objective

• Strong root growth
• Balanced nutrition
• Vigorous canopy development

Recommended Products

• Azotobacter
• PSB
• KMB
• Zinc Solubilizing Bacteria
• NPK Consortia

Expected Benefits

• Improved nutrient uptake
• Better chlorophyll formation
• Healthy shoot development
• Strong root system

May – June (Pre-Monsoon)

Objective

• Disease prevention
• Soil health improvement
• Pest monitoring

Recommended Products

• Trichoderma
• Pseudomonas fluorescens
• Bacillus subtilis
• Beauveria bassiana
• Metarhizium anisopliae

Expected Benefits

• Reduced root diseases
• Healthy soil biology
• Lower soil insect population

July – August (Monsoon Season)

Objective

• Protect against fungal diseases
• Manage sucking pests
• Maintain healthy roots

Recommended Products

• Trichoderma
• Pseudomonas fluorescens
• Verticillium lecanii
• Beauveria bassiana

Expected Benefits

• Better disease suppression
• Healthy root zone
• Reduced aphids, thrips, and whiteflies

September – October (Peak Flushing)

Objective

• Maximize nutrient availability
• Improve leaf quality
• Sustain high productivity

Recommended Products

• NPK Consortia
• Azotobacter
• PSB
• KMB
• Zinc Solubilizing Bacteria

Expected Benefits

• Continuous leaf production
• Better tea quality
• Increased nutrient efficiency

November – December (Preparation for Dormancy)

Objective

• Improve soil fertility
• Reduce overwintering pests
• Strengthen root system

Recommended Products

• Trichoderma
• Bacillus subtilis
• Metarhizium anisopliae
• Silicon Solubilizing Bacteria

Expected Benefits

• Stronger root system
• Better stress tolerance
• Reduced soil pest population
• Improved soil microbial activity

Integrated Bio-input Program

Soil Health

• Trichoderma
• Pseudomonas
• Bacillus subtilis

Nutrient Management

• Azotobacter
• PSB
• KMB
• ZSB
• SSB
• NPK Consortia

Disease Management

• Trichoderma
• Pseudomonas
• Bacillus subtilis

Insect Management

• Beauveria bassiana
• Metarhizium anisopliae
• Verticillium lecanii
• Bacillus thuringiensis

Benefits of Following an Annual Bio-input Schedule

Tea growers following a planned biological program can expect:

• Strong root development
• Improved soil fertility
• Better nutrient uptake
• Reduced root diseases
• Lower insect infestation
• Better tea quality
• Increased leaf production
• Reduced chemical fertilizer use
• Reduced pesticide dependence
• Long-term plantation sustainability