Rhododendron yakusimanum 'Schwanensee' H: 25 40 cm. Pink Pinwheels Rhododendron Allotment Diary : How to grow Chillies easily : This years Chilli Plants GE Grow Light for Plants, A19 LED Light Bulbs for Flowers and Fruit, 15 PPF (1 Pack) Have you ever spotted a blue tit in the park? Rhododendron 'Blue Tit', which is one of the smaller rhododendrons in the collection, is now in bloom, with its distinctive lavender blue flowers.