In Praise of Rhododendrons

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My Rhododendrons were in full bloom when a late frost caught them quite badly. Winter has been wet and mild but if the USA is anything to go by hard frosts may still be on the way so look after your early flowering Rhododendrons.

I just purchased a new containerised Rhododendron named ‘Sappho’. The picture on the label is of white flowers with spotted purple centres. There are lots of buds, about 20, and they are looking lilac.  I thought of taking it back as that was not the colour I wanted.

Arduaine Garden in Scotland is well-known in international Rhododendron circles for the number of wonderful species grown here, many of which are considered tender elsewhere and grow unusually under a canopy of mature Japanese larch. To some people, rhododendrons are those unpleasant purple-flowered objects which clog up our native woodlands. This is but one species, Rhododendron ponticum or a hybrid of it which spreads rapidly both by seed and sucker. Arduaine’s collection is extensive containing about 400 distinct species. The rhododendrons range from the large-leaved giants such as Rhododendron protistum, Rhododendron sinogrande and Rhododendron macabeanum to the small-leaved, high altitude plants which are often classed as rock plants, a sample of which would include Rhododendron fastigiatum, impeditum and orthocladum. In between these two extremes sit the majority of species of differing sizes with a variety of foliage shapes and an astonishing range of flower colour and form. One of the specialities is the only Rhododendron from Ceylon – Rhododendron arboreum subsp. zeylanicum.

Rhododendron Widgeon was been beaten to a great post by Jo Hanslip on insane journal

The common bleeding heart, Dicentra spectabilis (epecially the gold-leaf cultivar ‘Gold Heart’), gives the peonies a run for their money; so does Jeffersonia diphylla (twinleaf) and many heucheras. Scientists postulate that in some cases anthocyanins, flavonoid pigments which are often masked in the main growing season by the green of chlorophyll, may either serve to deter herbivores from nibbling tender new shoots or perhaps help attract pollinators, a kind of lurid “come hither” ensemble. If you don’t look like a leaf, maybe nobody will eat you–and looking like a flower extra-early increases your chance of getting pollinated when your flowers come not too long afterward.These pigments probably taste bad, too, compared to green ones–another deterrent to nibbling–and may help also tender young leaves cope with excess light (meaning the pigments are “photoprotective“).Whatever the particulars, I am happy to crawl around enjoying it, camera in hand. Crawl around with me in a quick slideshow? (Click the first thum

I gave L. sempervirens (Zones 4-9), whose woody stems twist around the corner post on my back porch the last decade, a serious pruning last year, after it seemed to have a lot of leggy growth that was especially appealing to the aphids. It has responded really favorably: heavy bloom and stronger growth after a year of recovery.Its far more subtle yellow-flowered cousin (above), L.s. ‘Flava’ or ‘Sulphurea,’ hasn’t really been troubled by insects here in all the years I’ve had it, and seems content to grow in part shade, not just full sun, an added blessing. If you will only have one sempervirens, maybe this should be it? (Hint, hint.)The L. heckrottii hybrid called ‘Goldflame’ (above, Zone 5-9) has been around for years and is also sold as ‘Pink Lemona

I’ve been sitting here with vases of multiflowered (also called bouquet) tulips in the house for more than two weeks now, specifically the variety ‘Red Bouquet,’ and from tightly closed to overblown and about to fall apart (about how I feel at the moment as well, by the way) they are a delight.The reason multiflowered tulips aren’t a formal class, the way Triumph or Double-Late or Greigii or another of the 15 officially recognized tulip classifications is? Because varieties with multiple flowers can occur in any class. The amazing red-hot tulip Tulipa praestans ‘Fusilier,’ for example, which will perennialize

Marion (with an impressive cabbage, below), is like her older sister and our parents a writerly type. Decades ago she began leaving voicemails that always started with, “I’ve got an Urgent Garden Question,” and then revealed her latest horticultural crisis.  In the early years, I suspected she was just trying to come up with an ice-breaker, and didn’t really need advice.We’d had some rough patches, as sisters do, and I knew she had a Master Gardener certificate—so why did she need my help? But it gave us a reason to speak, and get past things that had been in the way. For that I thank her (as I did in this 1989 essay and have been doing ever since). And I thank her for helping me solve my “how to do Q&A on the air” question, too.have a question to ask?WE’LL PUT OUT A CALL for your latest questions on Facebook before each Q&A edition of the radio show, and you can also ask here on the blog anytime. Each month I’ll gather the best ones—best as in likely to be most helpful to others—and answer them on the air.a way to garden

I’ve worn out a number of tip bags in my time, but generally speaking they’re pretty resilient creatures. I like the size-XL wide-mouth types, but you can get them smaller, more upright (like a giant beer can), or square, or even one that you wear. No kidding. Good if you are up on a ladder, for instance.I even turned some fabric nursery “pots” with handles into smaller tip bags, when I wasn’t happy with them for growing things.Most tip bags come with stiffening rings that you insert into the top lip, so the bag stays open. But as you can see from my photo, my tip bag’s usually at half mast, because I skip that feature. Just a quirk. Floppy is fine with me.I’ll admit I still feel sentimental about the bushel baskets—a.k.a., fruit baskets—that I used to be able to score at curbside outside the green grocer on trash nights. I loved getting them for free. (You can buy them by the dozen—but I don’t need a dozen;

Rhododendron Taurus, one of the best reds available.