As long as the water is wet, jerkbaits of all flavors and types will work.  

YES!!! HAHA

 

But I use flukes a lot for times in the summer. But hard jerk baits will get bit!

I'm looking forward to using the flukes as well. They magically appeared in my bag after bass pro. Must have put them in and forgot after checking out. Showing things to my family and it's like well look. I bought flukes. Oh boy. I don't remember buying it

Remember that a jerkbait works best in clear water when the bass can see if from a distance and think it is a dying or injured baitfish.

 

The bait will work all year.

 

However, depending on various factors other baits will work better than a jerkbait as the water warms and gets stained from the rains and runoff.

What are the conditions that a plastic jerkbait would work wonders in?

I've caught a fair amount of bass on jerkbaits in the summer. But I don't think that's he best bait to use.

What are the conditions that a plastic jerkbait would work wonders in?

Clear water. Jerkbaits have an advantage over most lures in clear water due to their drawing power. High skies, clear water, and a flashy jerkbait is ideal to me, especially for smallmouth.