Experts and BHG readers answer.
Short Stems on Reblooming roses
Thanks for writing. Do you see other stems grow after you cut your roses? If so, removing them so you only have one stem producing flowers at a time will help. The more flowering stems the plant produces, the less energy each stem gets.
Also, be sure to keep your roses well fed during the spring and early summer. And make sure your roses are watered adequately and in full sun. The less perfect the growing conditions are, the harder it will be for your roses to keep producing long stems.
---Justin, Senior Garden Editor, BHG.com "