The 2020 Hydrangeas

The hydrangeas in bloom this year have been beyond gorgeous. I have never seen them better, and I have been growing hydrangeas for a long time. The object of my affection and admiration are white flowering varieties that bloom on new wood. Blue and pink hydrangeas that bloom on old wood – this would be the bigleaf hydrangeas, or hydrangea macrophylla –  are not truly bud hardy in my zone. Unless they have a mild winter, whilst mulched from the soil level to the tops of the branches, the flowering will be sporadic and disappointing. If yours bloom profusely and reliably in Michigan, then count your blessings. The whole point of hydrangeas in bloom is the sheer splendor that comes from abundance. A happy hydrangea is so loaded with blooms the slender stems of the shrub will bend over from the sheer weight and volume of them. If you must have blue hydrangeas in all of their splendor,  then pack your bags for Nantucket, and read no further. The Bobo hydrangeas pictured above have astonishingly good care. The entire bed is on drip irrigation – essential when hydrangeas are in full sun – and that irrigation is monitored and updated frequently. I am quite sure they are fertilizing in late winter/early spring. Some apply Hollytone, by Espoma, or a slow release balanced fertilizer. The reward is an ocean’s worth of greenish white flowers.

That is not all. Later in the season those blooms will turn towards pink, and then rose pink. The fall display is every bit as beautiful as that in late summer. Add the yellow fall color on the leaves, and you have a visual treat that is quite spectacular. A good shrub provides interest in the garden over a long period of time. Hydrangeas are particularly generous with a long period of bloom. I leave the flower heads intact over the winter – why not? That cinnamon brown color is strikingly beautiful. Of course there will be those blooms that break off and blow around, but that cleanup is manageable.

This hedge of Limelight hydrangeas was planted for a client at their restaurant many years ago. I want to say at least 10 years ago, probably more. I am quite sure that they get watered; my clients takes great care of all of their plants.The soil is that typical Oakland County Michigan airless and non-draining clay-we planted them well above grade for exactly that reason. I have no idea what pruning and feeding care they get, but I can say their maintenance company was not permitted to work this year until May. So the spring care was fast and loose. Behind me in this picture is Woodward Avenue – a main road with 3 lanes going both north and south. It is packed with automobile traffic around the clock, in the 45-50 mph range. I would say the hedge is 25 feet off the road, and endures plenty of exhaust in the summer, and an equal amount of road salt in the winter. This commercial planting is stunning.

hydrangea Little LimeThis hedge of Little Lime hydrangeas is relatively new-it was planted 4 years ago. The flowers are at that fresh green stage, as they are just beginning to bloom. This exposure is westerly, which is a great location for hydrangeas. They need at least 6 hours of sun a day to bloom profusely. I am astonished at how many articles I read that suggest that hydrangeas do well planted in the shade. I have seen plantings in shady areas that range from sporadically blooming to passable, but I have yet to see a hydrangea thrive in shade. Of all the hydrangeas, the oak leaf is the most shade tolerant. Tolerant is the key concept here. No flowering plants, with a few exceptions, love shady conditions. They tolerate them. Find a sunny spot for your hydrangeas. These Little Limes get occasional supplemental water.

I get no end of questions about spacing. I have seen spacing recommended anywhere from 3′ to 8′. This hedge was spaced at 3 feet on center, with 2 rows of plants in staggered positions. The bed is 9′ in depth, and the Little Limes have filled that right up. An 8′ spacing on a Limelight hedge will produce a series of shaggy ball shapes. A closer spacing will produce a more uniform look to the hedge. I think spacing is primarily a matter of personal taste. If you are willing to wait a few years for a group of hydrangeas to grow together, then space them out. If you are after a densely growing hedge then space them closer. If there is a specific space to fill, then space to fit that particular space. Do I think one spacing is superior and produces more healthy plants than another – sun and water being comparable – ? No.

I have 2 blocks of Limelights at home that have been in the ground for close to 20 years. They were spaced at 30″. They have been healthy and heavy blooming every year. I have had Japanese beetle damage to the leaves, and scorch when I didn’t water enough, but they perform the same as a group spaced at 4 feet apart. I can vary the style and extent of my pruning every year, and not be able to see any difference in the blooming plants.  A good friend has planted and maintained miles of blocks of Limelights in the median on a major north/south road in my area.  They are the best blooming hydrangeas I have ever seen, in a year of great blooming hydrangeas.  I asked her about the care. They routinely feed with Hollytone, and they do water. The only difference this year was that they did not prune as hard as usual. Do I think this made the difference in the performance?  Maybe, or maybe not. Do I think the weather conditions were perfect?  Our season has been very hot and dry. Would I expect this to be great for hydrangeas? Not really.

Hydrangeas will tell you when they need water. Those big thin leaves clinging to the stems-as in the above picture of a hydrangea on standard – is a clear SOS. I do err on the side of water generosity, as I believe that plants stressed from being too dry perform at a less than optimal level. Newly planted hydrangeas need very careful monitoring for water. They grow so fast that most potted plants available for sale are root bound. If that root ball goes dry soon after planting, it is of no consequence how wet the soil is a foot away. The hose needs to be aimed directly at the crown of the plant.

This is all by way of saying that insofar as gardening with hydrangeas is concerned, various approaches to their cultivation can produce healthy and beautiful plants. They are so versatile in the landscape, as this pair of pots planted with Limelights can attest. Most and best of all, they are forgiving of neglect, and respond strongly to attention and care.

I have been enjoying them for weeks now.

Limelight Hydrangeas In Bloom

August 29 2014 (29)I know this is the mid westerner in me talking, but is there any shrub more widely hybridized and marketed and eventually disappointing than the hydrangea? I can barely keep up with the new cultivars. Some are blue.  Some are blue and pink.  Some are red. Some claim to bloom all summer.  A list of  of all the names would take better than a paragraph.  All Summer Beauty, Nikko Blue, Endless Summer, Pinky Winky, Vanilla Strawberry, Invinciball – the list is long. The promises made for these new introductions are big. The performance of various cultivars of hydrangeas in the mid west-a mixed report. I drive by big plantings of hydrangeas every day that are all about the leaves with precious little in the way of flowers. Some are planted in much too much shade.  But others just are not great bloomers. If you are a gardener in my area, and have a big love for hydrangeas that bloom reliably, consider the paniculata hybrids, especially the Lime lights.

August 29 2014 (26)We did have a terrible winter-no gardener would dispute this.  But the hydrangeas I see everywhere with one bloom or so is a usual thing.  Some cultivars bloom on old wood.  In a hard winter, the bloom shoots freeze.  Though the plant may come back and thrive, there are little to no blooms.  Some cultivars rely on more temperate zones than ours.  Some cultivars seem to bloom with abandon for growers, but fail to deliver with gardeners.  The Limelight hydrangeas pictured above are on a very busy street in my area, in full sun. They are blooming their hearts out.  I have no idea what the gardener in charge does for these plants, but they are gorgeous. It could very well that this gardener leaves well enough alone.  This brick wall would be lonely indeed without the hydrangeas.

August 23 2014 (14) I plant professionally, meaning plants that cannot or do not perform are discouraging.  I hope that every landscape I design and install encourages my clients to become involved, take over, and become interested in gardening when I am finished.  This means I favor plants that have some success features built in. I like plants that thrive. Hydrangeas in full bloom are breathtakingly beautiful. Hydrangeas are by nature lusty growing and just about fool proof, given a proper placement.  If you are keen for the flowers, and lots of them, Limelight delivers.

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I have read so many articles claiming that hydrangeas thrive in the shade.  Hmm.  The shrubs may tolerate part shade, but good blooming on hydrangeas in my area asks for a fair amount of sun.  Do  not plant hydrangeas in shade, if you have a love for their flowers. They like regular moisture – the leaves are large, and thin.  Those leaves will crisp if the plant goes dry.  I have my hydrangeas at home on a drip zone, so when they need a drink, I can provide it right to the roots.  I do not recommend overhead watering except when it comes from the sky.

DSC_4001The old Annabelle hydrangea is as charming and as floppy as ever. They bloom early, usually in June.  I like them placed on top of a wall, where their cascading habit looks graceful and deliberate.  The Oakleaf hydrangea is just as beautiful in leaf as in flower – maybe more so.  This bony structured, open growing hydrangea with its loosely arranged blooms-gorgeous.  Climbing hydrangea does tolerate a lot of shade.  It sits for a long time after planting.  Once it gets going, it can engulf a wall.

DSC_3982Pink and blue hydrangeas perform sporadically in my area.  There are neighborhoods where they are lush and floriferous.  I only have one client whose Nikko blue hydrangeas bloom heavily every year.  They are grown in full sun, in a fairly protected location.  The idea of using chemicals to alter the Ph of the soil is not my idea of gardening. Their is a hydrangea cultivar hydrangea macrophylla “Nantucket Blue”, for those gardeners with blue hydrangea envy.  I have never grown it, but I have seen it for sale with the caveat “acidify the soil with sulfur for a deeper blue color”. There are those times when I am envious of what gardeners in other parts of the country are able to grow that I cannot, but that feeling is not that deep seated.

DSC_4046Lime lights are very big growing plants.  Mine at home are over 8 feet tall this year.  They have loved all of the rain.  If your space is smaller, plant a smaller growing version.  Little Lime tops out at 4-5 feet. Little Lamb is another smaller growing panicle hydrangea.

hydrangea-Bombshell.jpgI am trying a new cultivar this year. “Bombshell’ is a dwarf cultivar that typically grows in a rounded mound to only 2-3′ tall and to 3-4′ wide. It was discovered growing in Boskoop, The Netherlands, in May of 2003 as a naturally occurring branch mutation on Hydrangea paniculata ‘Grandiflora’. It is particularly noted for its dwarf/compact shape, abundant star-shaped sterile flowers with elliptic sepals, dense nearly round flower panicles, and free blooming habit. It blooms earlier and longer than most other panicle hydrangeas.” – this description is from the Missouri Botanical Garden. I recently planted them with a collection of perennials that mature to about the same height.  Big growing shrubs that are pruned to fit small space always have that uncomfortable and anxious feeling about them.  A hydrangea planted with all the room it needs to grow is not only less maintenance, it looks good.

DSC_3983The Lime Lights are putting on a particularly good show this year.

DSC_4000It wouldn’t be late summer in Michigan without them.