My almost 50 year old rose has large blossoms but the stems are so thin,
that the blossoms cannot stand upright. Located in hot valley near Los
Angeles, CA.

This rose I call a rose tree, all leaves stems blossoms grow on top of
the 4 foot stem.

I feed regularly with a systemic food by BAYER company. Sun exposure is
about 5 hours per day.

Are weak stems a symtom of old roses or is there
something I can do to cause stronger stems?

Thank you, Dave