Corn Family

You can plant corn at the beginning of the season and harvest it until it wilts. Summer season will mutate your Corn in two different ways: into Fodder Corn used for making animal feed or into Sweet Corn. Once your basic Corn mutates into a new form, it won't mutate into one or the other. If you are trying to grow Sweet Corn and end up with a lot of Fodder Corn, then your only option is to plant more Corn and see what turns up.

Corn

Seeds: 10 G each

Growth Rate:

GREAT Season: Summer

Sell to Hanna (normal / great): 19 G / G

Sell to Sam (normal / great): 10 G / 17 G

Fodder Corn

Mutates from Corn when grown on Swampy or Grassy Soil during Summer.

Seeds: 50 G each

Growth Rate:

7 days (lvl 17)
9 days (lvls 15, 16, 18, 19)
11 days (lvls 13, 14, 20, 21)
12 days (lvls 11, 12, 22, 23)
13 days (all other levels)

GREAT Season: Summer

Sell to Hanna (normal / great): 19 G / ? G

Sell to Sam (normal / great): 10 G / 17 G

Sweet Corn

Mutates from Corn when grown on Swampy or Grassy Soil during Summer.

Seeds: ? G each

Growth Rate:

GREAT Season: Summer

Sell to Hanna (normal / great): ? G / ? G

Sell to Sam (normal / great): 31 G / 50 G

Sunset Corn

Mutates from Fodder Corn when grown on Grassy or Mixed Soil during Spring using Corn Blend fertilizer at least once, levels 10 to 22.

Seeds: ? G each

Growth Rate:

GREAT Season: Spring

Sell to Hanna (normal / great): ? G / ? G

Sell to Sam (normal / great): 31 G / 50 G

Yellow Corn

Mutates from Sweet Corn when grown on Grassy Soil during Winter.