Greenhouses allow growers to control the environment and grow crops year-round. Key factors that can be controlled include temperature, light, water, nutrients, and air. Heaters, lighting, and ventilation systems regulate these factors. Propagators and heated mats are used to start seeds and cuttings in warmer conditions than outside. Irrigation methods like misting, capillary matting, and seep hoses provide continuous water without over-watering plants.

1. ELBS Unit 1 B491 Lesson 11 Greenhouses. LOs 1. know how a glasshouse crop is grown (E-D) 2. understand how a glasshouse environment is controlled (D-C)

2. What we can control in a glasshouse? Pick 5 from: Light Sex of pests Temperature Humidity Water Altitude Bank rate Nutrients

19. ELBS Unit 1 B491 Lesson 11 Greenhouses. LOs 1. know how a glasshouse crop is grown 2. understand how a glasshouse environment is controlled