I transplanted a seedling rowan (think it was Joseph Rock) which was growing away in a flower pot. This was approx 5 years ago and it has flourished into a well shaped tree (approx 6/7 feet) with plenty of healthy looking leaves but -- no flowers and, of course, no berries. Two other rowans, admittedly much more mature are covered in berries this year. So disappointing - any ideas?
Rowan Not Flowering
Certified GKH Gardening Expert
Some species of rowan are quite slow growing, so it is possible that this tree is still too young to flower. Another possibility is that it's not getting enough sun, or lacks nutrients important for flowering including phosphorus and potassium. Correcting these issues should promote flowering.
See these articles for help: