Where we live, Cherry Belle radishes simply do not grow. They bolt, they go woody or don't form a radish at all. It's frustrating. So I started experimenting with different types of radishes. I found a winner.... called French Breakfast. They grow really well and take a lot longer to go woody. They taste good and are nice and crisp.
When seeding radishes, rototill the soil really well. Radishes are best grown early in the season as they prefer weather that is not too hot. Then seed your radishes as per the package. You don't want to seed them too close together, otherwise, they will do nothing and all you'll have are tops. I plant each seed about half an inch apart or more. Lightly cover with soil and water well. I make several plantings a week apart so that I have radishes for three weeks. The last bunch may not be as nice, depending on the weather and how hot it is.
Give them a whirl!