1. Plant Needs

2. Temperature Heat NRG Photosynthesis & Respiration are affected by temp
Slow Down w/ cool temp
Freeze Damage
Occurs when cell walls break as content of cells freeze
Flower cells are easily damaged
Greatest concern is w/ roots
Roots die  the plant will d

3. Heat damage Worse when Hot AND Dry
Plants transpire water through stomata
Stomata close if roots can’t keep up
Wilting: Drooping condition & lack of firmness
Caused by inadequate water
Loss of Turgidity: water pressure

4. Air Contains CO2 & O2 – critical for photosynthesis & respiration
Root cells must have O2 for healthy root growth
And to perform vital life processes
Humidity: water vapor in the air
Affects plant growth

5. Air Pollution Damaging to plants Dust reduces light intensity
Chemical Pollutants can kill plant cells or even whole plant
Plants clean air for humans

6. Water Photosynthesis and respiration require water
Minerals must be dissolved in water to be absorbed by plant
Water carries materials through the plant
Water makes up a large portion of plant cells, tissues, and organs

7. Drought Periods of insufficient rainfall Normal plant growth is slowed
Stomata close – won’t permit exchange of CO2 & O2

8. Too much Water Plants can be too wet Roots don’t receive O2
Seeds rot before germination

9. Irrigation Furnishing plants with water by flooding or sprinkling
Must be clean water