1) What is a clone and how are they propagated? 
A clone is any plant that is genetically the same as the parent plant.  A clone can be propagated several ways, the most common examples are; grafting, softwood cuttings, hardwood cuttings, and tissue culture.  Did you know that grafting is a common technique that horticulturists have used for centuries!?

2) Is a tissue cultured plant or “Clone” the same as a GMO plant?

 No, a tissue cultured plant is not the same as a GMO plant.  GMO, or genetically modified organism, is also known as transgenic.  This is when specific gene(s) from one species is introduced into a plant to change characteristics of that plant. Those genes can cross species, ie a gene from a fish introduced into a tomato plant.   One example of this is Round-Up Ready Canola, which has had genes introduced into the plant so that Round-Up will not kill it.  This is not the same as a hybrid or selected plant species that is bred to have traits from a parent plant such as color, fruit size, or hardiness.   Any plant can be a tissue culture candidate as along as there is a method to grow it in-vitro.  The plants that we choose to tissue culture are selected or hybrid plants with desirable traits that  occur through natural plant breeding processes.   Tissue Culture does not change those traits.

3) So, what is tissue culture?
We like to tell people that tissue culture is just old fashioned plant propagation but in a test tube.

4) Is tissue culture better than other methods of producing more plants?
We have observed that tissue culture invigorates the plants and makes them bloom and fruit at a younger age than they would if grown from seed.  We have produced fruiting saskatoon plants after one season of growth of our tissue culture plants!  Mind you, that is growing under optimum greenhouse conditions but there is no way that a seedling will do that!