Sure, here are some tips to help your radish plants grow quickly:

1. Choose the Right Variety: Select a variety of radish that matures quickly, such as French Breakfast or Cherry Belle, which can be ready to harvest in as little as 3-4 weeks.

2. Prepare the Soil: Ensure the soil is well-drained, loose, and rich in organic matter. Radishes prefer soil with a pH between 5.5 and 6.8. Incorporating compost before planting can provide essential nutrients for fast growth.

3. Plant at the Right Time: Radishes are cool-season crops, so plant them in early spring or late summer for optimal growth. Sow seeds directly into the garden bed or containers, spacing them according to the instructions on the seed packet.

4. Provide Adequate Water: Keep the soil consistently moist but not waterlogged. Radishes have shallow roots, so frequent, light watering is preferable to infrequent heavy watering. Avoid letting the soil dry out, as this can lead to tough, woody radishes.

5. Provide Ample Sunlight: Radishes thrive in full sun, so ensure they receive at least 6-8 hours of sunlight per day. If growing in containers, place them in a location with maximum sunlight exposure.

6. Thin Seedlings: Once the radish seedlings emerge, thin them to ensure proper spacing. Overcrowding can result in stunted growth and small, misshapen radishes. Aim for spacing of about 1-2 inches between each plant.

Following these tips should help you grow healthy radish plants quickly and enjoy a bountiful harvest!