Planting Letters (also known as Letter Garden) is the letter counterpart of Growing Numbers. In each segment a girl is watering her garden and the letter of the day comes out of the ground. The music for the segments was composed by Dave Conner, and feature vocals by Lillias White.
- I and U, not counting semivowels, are the only vowels not in the segment series
- O is the only letter from the second half of the alphabet in the segment series
- B is the only segment that only appears in non-Noggin episodes