This rust only infects the smooth hydrangea, H. arborescens , and hemlock as its alternate host. The following are some random questions to see if your answers trigger some ideas. Watch your yard to see which spots the sun shines on throughout the day. Location: The first thing you need to do in determining why your hydrangea is not blooming is identify the species you have. It is a Pee Gee Hydrangea I have had for more than 20 years. "If it's Hydrangea paniculata, then full sun isn't a problem in most areas (though, in areas with especially hot, dry summers, some afternoon shade can be beneficial)," he says. Now that you know which type(s) of Hydrangea you have, you can look at the reasons why your particular plant has decided not to bloom. "If it's a Hydrangea macrophylla, that gets a little tougher." (or a Paniculata Hydrangea) I’m not an expert gardener, I, like how my dad used to describe himself, am a ‘jack of all trades, and a king of none’… I know a lot, well… a little about a lot of things. When you are ready to prune your pee gee hydrangea, bear in mind that these hydrangeas produce blooms on new wood so you need to prune it in the early spring before that new wood starts to develop upcoming buds.. To do this the first thing you need to do is clean up any of the shoots that are coming out of the ground. The shrubs are … As flowering shrubs go, almost nothing is quite as showy as a hydrangea (Hydrangea spp.) Some bloom on old wood, some bloom on new. It has looked beautiful every other year, and I normally have to trim it a couple of times during the blooming season. The first symptoms are orange pustules on the bottoms of the hydrangea leaves and yellow spots on top. It’s important to point out that you don’t prune all hydrangeas in the same way. The third type of hydrangea is the Pee Gee hydrangea or paniculata. cindyloohoo, yes, Osmocote would be fine. To make sure your hydrangea is getting the right amount of sun, you need to know which variety you're growing. It is a Pee Gee Hydrangea I have had for more than 20 years. This is the largest of the hydrangeas and is often pruned to grow as a small tree. When asking why are hydrangeas not blooming, the most common reason is often over-pruning. If your plant looks healthy but still isn’t blooming, it might not be getting enough sun. These are called suckers. Like other rusts, hydrangea rust needs two hosts to survive and does not kill either of them. The Climbing Hydrangea is a vine with beautiful, lacy white or pink blooms that takes some time to get going, but is a great addition to the garden once it gets going. My Alice succumbed to root rot and I almost got a PeeWee this year. Six main things can contribute to why your hydrangea is not blooming. in full bloom. Most hydrangeas won’t bloom at all in the shade. Pee Gee is a sturdy shrub cold-wise so it is surprising that you are having blooming problems. Why Do My Hydrangeas Die or Not Grow?. But here are some things I know about the hydrangea tree we inherited when we moved into this 100 year old house… Different varieties of hydrangea are different. The best spots are ones that receive most of this sunlight in the early morning hours. It began leafing out this Spring and half of the bush looked normal and the other half looked like this. It has looked beautiful every other year, and I normally have to trim it a couple of times during the blooming season. It began leafing out this Spring and half of the bush looked normal and the other half looked like this. You can also use compost, composted manure or cottonseed meal. “Why doesn't my hydrangea bloom?" The blooms are creamy white and fade to … It wasn't until I became a Master Gardener that I ever thought about this question. 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