There are three sea buckthorn plants in the garden that bloom profusely every spring, but do not bear fruit.

There are three sea buckthorn plants in the garden that bloom profusely every spring, but do not bear fruit. What are the possible reasons? What can you suggest for the sea buckthorn to bear fruit?

If flowering plants do not bear fruit, this means that the flowers of these plants are not pollinated. Also, the reason may be in plant pathology and a lack of certain minerals, but this is very rare. If the problem is insects, then it is better to put a hive with bees next to it.