What is the best worm for composting? ...

Where can I attain rhubarb plants and seed?
Answers:    Red Wigglers. aka 'Bama Jumpers.

However - if your compost is outside, and you have winter - you would hold to insulate, or choose a different worm species. Red Wigglers don't do winter.

I have a worm bin surrounded by my house, with red wigglers, and since it never freezes, it's be going well for nearly 6 years.
Do Husky Cherry Tomato plants win terrifically towering?...
I academic in elementary arts school earth worms! =D...the the other one apart from red wrigglers is call Lumbricus rubellus. (you might find this link useful)