Annotated Sources

"Seed Propagation : Landscaping : Home & Garden Television." HGTV - Decorating, Home Improvement, Landscaping Ideas, Kitchen and Bathroom Design : Home & Garden Television. 9 Oct. 2009 .
This website focuses on how seeds are more efficient than starters. One reason being, they are a lot more cost effective, and they have a higher potential to grow plants that are larger in size. They have stronger roots, and are most likely live longer.

"PLANT PROPAGATION." HCS. 9 Oct. 2009 . .
This website talked about bringing plants and seeds from foreign country to another. This is how many serious insect and disease pests are introduced into different countries. A nonnative plant may become a noxious weed, and might effect the growth and reproduction of other plants.

"Saving Heirloom Seeds | Suite101.com." Vegetable Gardens: Heirloom vegetables, farmers markets, container, raised bed and community gardening, reviews of gardening tools, tips on fertilizers, irrigation, pest control and more. | Suite101.com. 12 Oct. 2009 .
Time isolation is where you time your plantings so that different varieties of the same plant don't flower at the same time, and won't pollinate each other.To keep your heirloom seeds pure, you should carefully plan your garden design and plant your vegetable garden with pollination needs in mind.