WHAT IS THE DIFFERENCE BETWEEN ROSE BALLING AND BOTRYTIS

Question

I HAVE MANY ROSES UNAFFECTED IN SAME BED BUT 4 PRINCESS DE MONACO HAVE ALWAYS BEEN AFFECTED, EVEN THOUGH THEY ARE SPREAD AMONGST OTHER ROSES – HUGE BLOOMS BUT THEY NEVER OPEN FULLY. ANY ADVICE WOULD BE APPRECIATED

Answer 1

Here is a link to an article I wrote on this topic for you: https://www.gardeningknowhow.com/ornamental/flowers/roses/what-is-rose-balling.htm

Botrytis causes the balling due to a fungus. Using a fungicide such as one called Mancozeb which is available at Amazon.com. Be advised that the mancozeb fungicide will leave a powdery looking yellowish residue on the foliage and buds as that is part of how it works.

Answer 2

Here is a link to an article I wrote on this subject for you: https://www.gardeningknowhow.com/ornamental/flowers/roses/what-is-rose-balling.htm The Botrytis is caused by a fungus and its appearance can be clearly seen. Treat it with a fungicide named Mancozeb. Be advised that the mancozeb will leave a yellowish powdery residue on the foliage and buds but that is part of how it works.

Answer 3

Are your Princess rose stems closer together than your other roses? Lack of air circulation can promote rose balling.

Rose balling is triggered when rain soaks formed buds then a hot sun dries them causing the petals to stick together. A slime may form as well. The buds cannot open and just wither away.

Botrytis blight is a fungus that attacks roses with a similar result. A gray mold forms on the buds preventing them from opening. A fungicide can help remedy botrytis.

This article offers tips on preventing rose balling.

https://www.gardeningknowhow.com/ornamental/flowers/roses/what-is-rose-balling.htm