Crop Management in the Greenhouse:

Nursery Establishment

a)      Green house varieties:-

Anna, Arleta, Nemoneta, Monset,  Monyala, Ken Tom etc

b) Construction of germination boxes

  • Measure boxes of 100cm (length) x 45cm (width) x 10cm (depth)
  • Fill the first 5cm of the box with small stones (2 inches) followed by 2cm of sand and then 2cm of forest soil mixed with well rotten manure or use the already mixed growing medium
  • Mix the forest soil/growing medium with a handful of DAP fertilizer and Nematicide to control nematodes.
  • Make drills of 8cm apart, leaving 5cm from both edges of the box. This gives 10 lines/box
  • Plant 50 seeds per line (to give 500 seeds/box). 2 boxes are required per green house unit.

c) Nursery Management

  • After sowing, cover the seeds with a thin layer of soil or sisal bag and water immediately

Water twice a day, early in the morning and late in the evening for the first 2 weeks Reduce watering in the third week to harden off the seedlings


  • Transplanted at 3 weeks.
  • Water the beds. Transplant late in the evening or early in the morning on a cloudy day
  • Dig holes at 50cm x 30cm in zigzag or alternate (in tandem)=400 plants or 33cm x 30cm= 600 plants per green house
  • Apply 20gms per hole (1 tablespoonful) of DAP/TSP/DSP and mix thoroughly with the planting medium to avoid direct contact with the seedlings. The fertilizer may be applied three days after transplanting. Water thoroughly after fertilizer application.

Note: When transplanting spray with Preventive fungicide such as Dithane M45, Milthane Super, Sancozeb,  etc.

After transplanting, initial watering should be mixed with a curative fungicide to eradicate any fungal manifestation e.g. Ridomil,  Equation Pro, Galben, Milraz, Acrobat etc.


  • A strong wire 10-14 gauge is placed parallel to the row of plants from one end of the house to the other at the height of the posts (3 m) from the ground.
  • Sisal twine is tied around the stem base of the plant, which is then trained to achieve 8 – 12 trusses of tomatoes.



Done early to remove side suckers or branches to leave one stem only per plant.

Bud Nipping:-

To get healthy and uniform fruits remove apex or growing bud when plant achieves 8-12 trusses (to remove apical dominance)

Leaf Trimming and Defoliation

This is cutting of leaves and removal of excess leaves in order to avoid bushy plants, which reduce fruit growth.

Top Dressing:

Apply 20g of CAN per plant, 2 weeks after transplanting and 20g CN (Calcium Nitrate) 2 weeks later to encourage vigorous growth.

Thereafter apply foliar feed at 2 weeks interval to provide micronutrients.