Growing Plants in a Greenhouse

What is a Green House?

A greenhouse is a structure with walls and roof made chiefly of transparent material, such as glass, in which plants requiring regulated climatic conditions are grown. Sun rays enter the greenhouse where they are absorbed by plants and other objects and converted to heat. You can have a greenhouse of any dimension, and maintain any environment temperature which is why they are preferred amongst gardeners.


Plants to Grow in a Green House


  • Soil: Carrots need soil that is friable, well-drained, has a neutral-alkaline pH and is not too nitrogen-rich.
  • Benefits: They contain lots of beta carotene and vitamin A which helps improve eyesight and are absolutely fantastic for those suffering from macular degeneration or cataract.
  • Varities: Danvers, Nantes, Imperator and Chantenay.
  • Temperature: Carrots experience excellent growth between 16°C to 20°C
  • Water: Carrots need a minimum of 1in. of water every week. Make sure to completely soak the soil, and not just the surface to get good root growth.
Fresh Carrots
Fresh Carrots


  • Soil: Onions do well in non-compacted, fertile, well-drained sandy loam soil which has a pH of 5.8 to 6.8.
  • Benefits: Onions are loaded with anti-oxidants, contain cancer-fighting compounds and maintain blood sugar.
  • Varieties: Yellow Onions, Sweet Onions, Red Onions, White Onions, Shallots and Scallions.
  • Temperature: Optimal growth takes place between 20°C to 25°C
  • Water: Onions require 350mm to 550mm of water throughout their growth cycle.
Different types of Onions
Different types of Onions


  • Soil: Spinach needs well-drained soil that is rich in organic nutrients, with a pH of bout 6.5 to 7.
  • Benefits: It prevents cancer, reduces blood sugar and aids bone health.
  • Varieties: Savoy Spinach, Semi-Savoy Spinach, Smooth Leaved Spinach and Malabar Spinach.
  • Temperature: Spinach has a germination temperature between 10°C to 22°C
  • Water: 1in. to 1 1/2 in of rain/irrigation per week is sufficient. Since it grows best in cooler temperatures, over-watering must be avoided.
Fresh Spinach
Fresh Spinach


  • Soil: Eggplant prefers well-drained, fertile, sandy loam soils with a pH between 5.5 and 7.2.
  • Benefits: They are a great source of vitamins and minerals, help with digestion and improve heart health.
  • Varieties: Graffiti Eggplant, Italian Eggplant, Japanese/Chinese Eggplant, Fairytale Eggplant, White Eggplant, and Indian Eggplant.
  • Temperature: Eggplant requires 100 to 140 warm days with temperatures of 21°C to 32°C
  • Water: Eggplants are best watered 1In. every week during their growing phase.
Fresh Eggplant
Fresh Eggplant

Lady Fingers

  • Soil: Ladyfingers thrive in loam, well-drained soil.
  • Benefits: They help in maintaining immunity, reduce weight loss and relieve constipation.
  • Varieties: Blondy Lady Finers, Clemson Spineless Lady Finers, Silver Queen Lady Finers, and Cow Horn Lady Finers.
  • Temperature: Lady Fingers thrive well in 25°C to 35°C
  • Water: Ladyfingers need approximately 1In. of water every week.
Orka/Lady Fingers
Orka/Lady Fingers


  • Soil: Potatoes prefer well-drained, light, deep, loose soil with a slightly acidic pH (4.8 to 5.5).
  • Benefits: Potatoes contain anti-oxidants, improve blood sugar control and digestive health
  • Varieties: Russet, Red, White, Yellow, Purple, Fingerling and Petite.
  • Temperature: Potatoes require 15°C to 20°C, although it is said to adapt to a vid variety of climate conditions.
  • Water: Potatoes need 1In. to 2In. of water per week

Caring For Green House Plants


  • It is always better to plant multiple seeds together since germination is never guaranteed. This improves the chances of at least one seedling taking root.
  • Make sure to avoid overgrowth by selective thinning. Remove the weaker seedlings via proper inspection.
  • Transfer seedlings to larger pots once they have grown.
Caring for Seedlings
Caring for Seedlings


  • There are several methods available, like manual watering, drip irrigation or using capillary mats.
  • The optimum temperatures at which roots absorb water really well is 68°C

Drip Irrigation
Drip Irrigation

pH Level

  • Different plants need different pH levels of water.
  • For a lower pH, add sulphur, phosphoric acid or a pH-lowering solution.
  • Raise pH by adding lime or wood ash

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