Kleim's Hardy Gardenia, or Gardenia jasminoides 'Kleim's Hardy,' is a popular cultivar known for its cold hardiness, fragrant flowers, and evergreen foliage. Here are some key features of Kleim's Hardy Gardenia:

1. Hardiness: As the name suggests, one of the standout features of Kleim's Hardy Gardenia is its increased cold tolerance compared to other Gardenia varieties. It is considered more cold-hardy and can withstand cooler temperatures than many other gardenia cultivars.

2. Flowers: Kleim's Hardy produces fragrant, white, star-shaped flowers. The blooms have a sweet and pleasant fragrance that adds to the plant's appeal. Flowering typically occurs in late spring to early summer and may continue sporadically throughout the growing season.

3. Foliage: The plant has glossy, dark green leaves that remain evergreen throughout the year. The foliage provides an attractive backdrop to the white flowers.

4. Size: Kleim's Hardy Gardenia is a compact shrub that typically reaches a height and width of around 2 to 3 feet, making it suitable for smaller gardens, containers, or as a low hedge.

5. Sunlight Requirements: Like most gardenias, Kleim's Hardy prefers a location with partial shade to filtered sunlight. However, it can tolerate more sun in cooler climates.

6. Soil and Watering: Gardenias thrive in well-draining, acidic soil. Regular watering is important, and the soil should be kept consistently moist but not waterlogged.

7. Landscape Use: Kleim's Hardy Gardenia is often used as an ornamental shrub in gardens, borders, and containers. Its compact size and cold tolerance make it a versatile choice for various landscaping applications.

8. Frost Protection: While considered more cold-hardy than some other gardenia varieties, providing some protection from harsh winter winds and frost can help ensure the best performance in colder climates.

As with any plant, proper care and attention to its specific needs contribute to its health and performance. Gardenias, including Kleim's Hardy, benefit from regular pruning to maintain their shape and remove dead or damaged growth. Additionally, amending the soil with organic matter and providing an acidic fertilizer can support their overall well-being.