Sentence:  In addition to being an SSE member, we are also conducting our own seed exchange program, and we will gladly send trial samples of either Siberia or Glacier to SSE members for any <WSD>cold-natured</WSD> variety of tomato, beans, peas, squash or pumpkin that is no longer being sold. 
Meaning of the word marked with <WSD> tags:  Thriving in colder environments.