Frost proof your garden

Article Gallery: 

Keep an eye on the frost warnings so you can take the necessary precautionary measures to protect tender plants. 

Cover up the plants before dusk because the stored heat of the plants and soil during the day it's gone almost completely before nightfall. 
You can use various materials as newspaper, cardboard, old blankets, sheets, burlap sacks etc. For light covers you don't need a frame against a plant, only securing the cover with rocks, bricks, stakes etc. Use wire framing or just a single stake for heavier covers to avoid crushing of the plants. 
Don't forget to remove the covers next day, once the frost has thawed, to let light and air in, thus avoiding suffocation and overheating. 

As cold air is denser then warm air, it settles in the lower areas of the garden. A good idea it's to make some raised beds for small tender plants. 

Smaller plants can be covered with paper cups, flower pots turned upside down, plastic jugs with the bottom removed, glass jars etc, that will act as a 
heat trap. Again, it's important to remember to remove the covers next morning. 

As the plants collect heat during the day, you can do that too. Fill milk jugs with water and paint them black, placing them around your plants.
Because black absorbs light radiation and the water releases heat slower than other materials, the collected heat will radiate throughout the night. 

Because potted plants roots are more susceptible to frost damage, you should protect them also, in addition to the foliage protection measures.  Use bubble wrap or just burry the pots.

You can also use cold frames to protect tender plants. Either you buy them at most garden centers or build them easily at home. Brick, wood, cinder blocks make good enough materials for the sides, as old windows or even storm windows can make a good top. 

But the best way to know the type of precautionary measure you must take is knowing your plants individual needs. The more you learn the better you can protect your garden and plants.