Adelmanto,
Hardy Chicago leaves are normally thick and rough.
There are two major reasons for slow growth from 1 gallon nursery grown trees,
1. They may be root bound with little soil nutrition and or
2. They may be "node bound" from the practiced pruning procedure (to keep the trees small).
Its been my observation that the roots have usually circled the container several times and the Slow Release Fertilizer that is provided at the nursery is just sprinkled on top of the growing medium and was not able to be dissolved and absorbed by the roots. Also the 1 gallon trees have been pruned continually with heading cuts, which often creates sections of stem with close internode spacing which retards plant growth, the pruning also produces multiple branches with figs which slows the growth of the young plant even more.
I purchased several fig plants (Hardy Chicago, Kadota, Mission and Brown Turkey) from Lowes 2 years ago and the ones that were bare rooted and planted in 5 gallon containers, pruned and trained as single stem trees grew over 3 feet in the same season. The ones that weren't bare rooted only grew a few inches. I posted pictures of these trees in several older topics.
Good Luck.