Why have the leaves on my rose bush fallen off?

Answer by  calamityjean (173)

Foliage loss in roses can be due to a number of causes. Diseases such as black spot will cause yellowing and leaf drop. A severe aphid infestation curls leaves and defoliates the plant. Unseasonably cold weather, transplant shock, and lack of water can cause leaf drop as well.

Answer by  MattK (1713)

Roses are prone to a bunch of diseases that can cause whitish spots on the leaves, yellowing, browning and a lot more, all involving the leaves. Sounds like it's dying.

Answer by  Duncan (1124)

Rose bushes are affected by seasonal change in many areas. In northern climates, it is common for the leaves to fall off in fall and winter. In more moderate temperatures, lack of water, root damage, or sunlight could cause leaves to fall out.

Answer by  terry82 (191)

Getting enough water? Black spots on leaves? It's a fungus and has to be sprayed. White insects underneath a good leaf? It needs to be treated for aphids.

Answer by  ponni (43)

mostly the leaves fall due to fungus and with out water. mostly black fungus arise in rose bushs, and starts with black spots and it turns into yellow fall off.

Answer by  mcmario2007 (786)

Your rose bush appears to be having a fungus infection and this causes the leaves to turn yellow and gradually turn black and die hence the leaves fall off this is a very common infection caused by fungus.