Buy the 2015 Old Farmer's Almanac!
Reporting
If you keep the sunflowersIf you keep the sunflowers clustered, you will probably get taller stalks but smaller heads. It's fine to sow them in a clump, but you'll want to thin them to 3 or 4 for size. If you want a giant, them them to 2 plants at 1 foot tall. It's up to you!

Shop Wind Bells in the Almanac General Store