When Rhododendron Bushes Do Not Flower. Like many plants in the landscape, rhododendrons have very specific needs that must be met before they will bloom freely. Get a Free Quote! Why Is My RhododendronNotBlooming In Victoria, BC.Here are some common reasons why rhododendrons may fail to bloom: 1. Insufficient Light. RhododendronsNotBlooming: 7 Common Reasons#. It can be disappointing and bewildering to gaze out the window at your rhododendrons have notbloomed . The usual suspects when rhododendrons fail to bloom are dense shade, drought or overfertilization. ... In spring, the plants use large amounts of water for new growth and flowers. Another reason for a rhododendronnotblooming - and this holds with most flowering shrubs - is that the plant is not getting enough sunlight. A rhododendron does best in a place with... Discover Pinterest’s best ideas and inspiration for Rhododendronbloom time.nlock the Answer to Why Your Rhododendrons Aren't Blooming and bring back their stunning floral display! Rhododendrons require bright but filtered sunlight to bloom properly. If they are planted in a location with too much shade or not enough light, they may not produce blooms. Rhododendron in bloom. This one has not been here too long so it is still kinda small but the blooms definitely are not. If you are a gardener who feels a post-bloom depression, take heart. Many rhododendrons are late bloomers and extend the season well into summer. Frost on Rhododendrons. Most rhododendronsbloom in late spring, around the end of April in most zones. There are exceptions.Rhododendrons may notbloom when they need water. Rhododendronsblooming early may look beautiful, but it’s a warning sign. It signals that our climate is changing at an alarming pace, disrupting natural cycles that have existed for centuries. There is another brochure that includes some rhododendronsnot in the the one linked to above, organized by blooming month: Ted and Mary Greig Garden walking tour brochure... Vibrant pink bloomingrhododendron in mountains at a sunset. Before you choose any rhododendron variety to plant, make sure it will go well with your region. · Learn how to troubleshoot the most common causes of rhododendron failure to flower, such as lack of sun, water, or pruning. Find out how to water, fertilize, and care for your rhododendrons to enjoy their beautiful blooms. · The top six reasons why your rhododendron isn't flowering include improper pruning, nutrient deficiencies, and dense shade. These factors can lead to a lack of light, too much fertilizer, the age of the plant, and the bloom patterns. · Here, I’ll outline specific issues and solutions related to non-flowering and poor growth, and how to tackle environmental and nutritional problems that can affect these beautiful flowering shrubs. Why didn’t my rhododendronbloom? Your rhododendron may not have bloomed due to being pruned at the incorrect time of year. Rhododendron buds grow for 10 months before blooming into flowers, so if the rhododendron is pruned during this period the buds will be cut off. View all In this article, I’ll distill everything I’ve learned to help you diagnose your rhododendron’s problem and give you the secrets and tricks to ensure it can flower the following year. Let’s get straight to it, shall we? · Why are My Rhododendrons Not Blooming? Not enough light, too much fertilizer, the age of the plant, and the bloom patterns are the most common causes of rhododendrons refusing to bloom. Why didn’t my rhododendronbloom? Your rhododendron may not have bloomed due to being pruned at the incorrect time of year. Rhododendron buds grow for 10 months before blooming into flowers, so if the rhododendron is pruned during this period the buds will be cut off. In this article, I’ll distill everything I’ve learned to help you diagnose your rhododendron’s problem and give you the secrets and tricks to ensure it can flower the following year. Let’s get straight to it, shall we? · Why are My Rhododendrons Not Blooming? Not enough light, too much fertilizer, the age of the plant, and the bloom patterns are the most common causes of rhododendrons refusing to bloom. • Bloom Pattern: Again, the species of your rhododendron matters! Some species simply don’t bloom every year, or will bloom heavily one year and need another to rest before doing it again.