Typical Lighting Needs

• Most varieties of roses need a minimum of four hours of direct light per day, but ideally they should receive more. Some varieties, such as miniature roses, prefer as many as 16 hours of light.
  
  

Indoor Lighting

• Because the sun can be an unreliable source of light during the winter months, many gardening enthusiasts choose to grow their roses indoors. High-intensity grow lights are recommended for indoor use during the winter months.
  
  

Lighting Colors

• Blue-spectrum lighting promotes the growth of stems and vegetation and is recommended during periods of non-blooming growth, while red-spectrum lighting is preferred when roses are in bloom.
  
  

Temperature

• Many varieties of roses are capable of withstanding temperatures as low as -10 degrees F, though most outdoor growers take measures to protect their roses against extreme cold. Conversely, most varieties do poorly in hot climates.
  
  

Grow Lights

• Fluorescent bulbs are inexpensive and do not get too hot, so they can be kept closer to the plant. Incandescent lights can be used as supplements for plants that receive the bulk of their light from another source, such as a window.