This cultivar is listed as triploid in the paper 'Pollen diameter and guard cell length as predictors of ploidy in diverse rose cultivars, species, and breeding lines'

Even with spraying this beautiful mini always defoliated from blackspot in my s. Ontario garden. Continued to flower even when most leaves had fallen. Eventually pulled it out but have found nothing yet to match those gorgeous little blooms with their elegant buds and orderly petal arrangement.

Jeanne LaJoie has been a great performer for me, right from the get-go. My plant is on its own roots and continuously produces new canes. The first spring bloom is amazing -- literally sheets of blooms. Rebloom is very quick (I deadhead thoroughly) and rebloom is almost as prolific as the spring flush. Flowers are pretty, clean well, but have NO fragrance. My only complaint is if I fertilize I get some mildew on the flower buds. That's easy -- I just don't fertilize except for some compost in the spring and fall.

Highly recommended if you're looking for a short climber.