In your garden
The rowan’s yellow/white blossom can be seen in May and June and this turns into clumps red berries which are at their most ripe in late summer, early autumn. They are irresistible to over 60 species of birds (including the thrush and blackbird) and mammals (such as squirrels and dormice), but they are not digested and are passed in their droppings to aid in the widespread propagation of the new generation of rowan.
Threats your rowan may face
Insects don’t seem to like to eat the rowan tree’s leaves, but larvae from the leaf minor and several species of moth can cause damage. Some snails feed on the leaves and rust fungus can create raised discoloured spots called galls to form.
Rowans can also be blighted with silver leaf disease, which is a fungus that can infect the wood of the tree and kill it branch by branch after turning its leaves a silver grey-green. Apparently one of the most common causes of this disease is poor pruning as the larger (longer to heal) wounds left by an amateur ‘have-a-go’ tree surgeon are the perfect way in for the fungal spores. As the fungus produces the highest volume of its spores in the wintertime it’s best to prune infected trees in the summer, disinfecting your equipment as you go along to avoid the spread of this infection.
A few things you may not know about your rowan trees