1: Avoid planting gardenias in heavy clay soil.

2: Never overwater gardenias, as it can lead to root rot.

3: Do not plant gardenias in full shade; they need sunlight.

4: Avoid planting gardenias too close together; give them space to grow.

5: Never prune gardenias in late summer or fall; wait until after blooming.

6: Avoid using high-nitrogen fertilizers on gardenias; it can harm them.

7: Do not let gardenias become overcrowded with other plants.

8: Avoid planting gardenias near concrete or asphalt; they prefer acidic soil.

9: Never plant gardenias in areas prone to standing water; they prefer well-drained soil.