Gardenia varieties for indoor growing

Start with mature size: Gardenia jasminoides is listed around 1 to 1.5 m, while ‘Kleim’s Hardy’ and ‘Crown Jewel’ are about 0.5 to 1 m. That changes the container and display choice.

Plant coveredGardenia jasminoidesGardenia · indoor container

Check the species, variety, group or trade name

Plant names and labels

Taxonomy
Gardenia jasminoides is also recorded by RHS under synonyms including Gardenia augusta and Gardenia florida. Use the name Gardenia jasminoides only for that species, not for the broader Gardenia genus. Do not identify an unnamed plant as a particular cultivar from the common name alone.
Group
RHS treats Gardenia jasminoides as the main flowering houseplant gardenia and lists named selections alongside the species, including ‘Kleim’s Hardy’ and ‘Crown Jewel’. This is a consumer houseplant group, not a complete classification of all Gardenia species or hybrids.

Compare visible shape, pattern and size

How the varieties differ

RHS lists Gardenia jasminoides at about 1 to 1.5 m and named selections such as ‘Kleim’s Hardy’ and ‘Crown Jewel’ at about 0.5 to 1 m. That size difference changes the practical choice for a windowsill or container.

Change care only for a named difference

Care differences

The selected RHS guide gives the named selections the same broad indoor baseline: bright indirect light, warmth, humidity, acidic compost that stays evenly damp without waterlogging, and spring repotting. Compact size mainly changes space and container planning, not a proven separate watering or feeding recipe.

Treat an unverified identity as uncertain

Limits of plant labels

Sources