Experts and BHG readers answer.
ENCORE AZALEAS WONT BLOOM MORE THAN ONCE
Thanks for writing. Be sure your azaleas are in the right spot: Morning sun and afternoon shade or a bright filtered shade all day (so the plants get enough light; if they get too much shade, they won't be able to bloom well) and a moist, but well-drained soil that's rich in organic matter and has an acidic pH.
Did you just plant them this year? If so, the plants may be working on becoming established in your yard. If this is a case, the best thing I can recommend is patience.
---Justin, Senior Garden Editor, BHG.com