Question: Help straggly petunias to grow new lush flowers.

  Options: 
 A. Petunias will get long and straggly and stop producing flowers unless you cut the roots back about one third, about once a month. This will generate lush new growth all summer long.
 B. Petunias will get long and straggly and stop producing flowers unless you cut the foliage back about one third, about once a month. This will generate lush new flowers all summer long.
Answer: B