Six on Saturday #7

Another Saturday, another six things in the garden.  Thanks to The Propagator for suggesting this idea and for hosting links to other ‘Six on Saturday’ participants.

1. Lilium catesbaei (pine lily)

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Lilium catesbaei

Lilium catesbaei grows on the coastal plain from southern Virginia to eastern Louisiana.  It is a plant of  open, fire-dependent pine savannas, where it often grows among carnivorous plants, orchids, and other plants that favor damp, acidic conditions.  L. catesbaei is rarely available from nurseries, but about fifteen years ago, I grew a batch from seed obtained from another member of the local orchid society.  In recent years, the number of blooming plants has decreased until this year there are only two flowering.  I think it may be time to dump out the pots, assess what I have left, and repot in fresh soil.

2.  Lantana camara ‘Miss Huff’ (Hardy Lantana)

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Lantana ‘Miss Huff’

Lantana ‘Miss Huff’ seems to be the hardiest commercially available clone of L. camara, and it is the only one that has successfully over-wintered in my garden.  I have three plants in sunny, moderately dry spots.  They freeze to the ground each winter and new growth emerges several weeks after the last frost.  By late summer, the bushes are about 6′ (~2 m) tall and wide.  Usually, I see the first flowers at the end of May, and then the plant blooms non-stop until the first frost.  Buds and young flowers are bright yellow-orange, maturing to a darker orange and then fading to pink before dropping.

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Papilio glaucus on Lantana ‘Miss Huff’

The flowers are moderately attractive to hummingbirds and attract large numbers of butterflies.  It’s a great plant for guaranteed color even in the hottest and driest summers.

3.  Vernonia glauca (Broadlead Ironweed)

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Vernonia glauca

Vernonia glauca is a true piedmont native, found primarily in Virginia and North Carolina.  I obtained seed about ten years ago from the North Carolina Botanical Garden seed distribution program.  I initially grew them at the back of a flower bed with other tall perennials, but the seeds, each with a tuft of fluff, have been carried on the wind all over the garden.  At this point, it is almost a weed, and the long taproot makes it very difficult to eliminate.  Beware seeds that have their own parachute.

4.  Titanotrichum oldhamii

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Titanotrichum oldhamii

I currently have two semi-hardy gesneriads blooming in the garden.  The first, Titanotrichum oldhamii, is native to China (Fujian Province), Taiwan, and Japan.  I love the bright yellow flowers that resemble foxgloves.  I bought my T. oldhamii plant last year, so it has survived one winter in the garden so far, and has come back bigger and stronger this year.  It is growing in the shade of a large Callicarpa americana (American beautyberry) in fairly rich, well drained soil.

5.  Seemannia nematanthodes ‘Evita’

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Seemannia nematanthodes ‘Evita’

The second gesneriad is a native of Argentina.  Seemannia nematanthodes ‘Evita’ seems to grow equally well in the ground or in pots and hanging baskets.  I started with a couple of stems in a 3″ diameter pot, but the plant expands exponentially each year.  In autumn, the above-ground stems, thin underground rhizomes, and roots die back, leaving small, scaly rhizome segments that look disturbingly like maggots.  These rhizomes can be left in the soil or stored dry in a plastic bag.

In addition to growing Seemannia ‘Evita’ in semi-shaded beds around the garden, I keep a couple of potted plants.  When it is time to repot in early spring, I usually have far too many rhizomes, so I add the extras to the flower beds.  Consequently, I don’t really know how hardy Seemannia ‘Evita’ is, because I can’t be sure which of the plants blooming now are derived from rhizomes that survived the winter in the ground, and which are from rhizomes planted this spring.

6.  ‘Celeste’ figs

Celeste

These figs from the garden were dessert yesterday. I grow three varieties of Ficus carica:  Celeste, Black Mission, and Conadria.  Of the three, Celeste is the hardiest and most productive, so it isn’t surprising that it is the most commonly grown variety in this part of North Carolina.  Celeste figs are small but intensely sweet, and if I don’t pay close attention they’re eaten by birds, squirrels, wasps and ants as soon as they are ripe.

That’s my six for this week.  Now, I have to go outside and attempt to dislodge a squirrel that is building its nest under the solar panels.  Hope I don’t fall off the roof.

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Six on Saturday #2

With just under an hour left of Saturday,  here are six pictures from the garden today.  Lots of yellow this week.

1. Alstroemeria ‘Konkajoli’

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Alstroemeria ‘Koncajoli.’

I have tended to avoid Alstroemeria hybrids, because many are reported to be invasive. This was advertised as a civilized cultivar that doesn’t take over the flowerbed. After two years, I’m starting to wonder if it is too civilized. It seems to produce just one stem at a time and shows no inclination to form a nice clump. Pretty flowers, though.

2. Hydrangea quercifolia

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Hydrangea quercifolia

When I blogged about oakleaf hydrangea a couple of weeks ago, I mentioned that the flowers would soon fade to pink.  Well, they have.

3.  Verbascum chaixii

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Verbascum chaixii, nettle-leaved mullein

Unlike many mulleins, V. chaixii is a perennial rather than a short-lived biennial.  I have both the yellow- and white-flowered forms growing in the sunnier areas of the garden. Hoping for volunteer seedlings but haven’t seen any yet.

4.  Ligularia japonica ‘Chinese Dragon’

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Ligularia japonica ‘Chinese Dragon’

This species isn’t thrilled with our hot summer, but it seems to do reasonably well in the shade of a dogwood tree. The deeply cut leaves and big yellow flowers are interesting, but I really like the flower buds.  They are ribbed longitudinally and look like miniature green pumpkins.

5. Canna ‘Tenerife’

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Canna ‘Tenerife’

Canna season has started, which means lots of bright flowers, lush foliage, and constant checking to make sure that caterpillars of the lesser canna leafroller moth (Geshna cannalis) aren’t feasting on leaves that they seal  with a loop of silk before the young foliage can unroll.  The leafrollers are ugly, maggoty-looking things that skeletonize canna leaves and make a mess with their frass.  I hate to use pesticides on plants that attract so many pollinators, so I have to squish the caterpillars by hand.  Yuck.

6.  Canna ‘Pacific Beauty’

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Canna ‘Pacific Beauty’

The flowers of this clone look almost fluorescent against the dark brown/purple foliage.  In this climate, cannas can be left in the ground year round, as long as the rhizome is planted six or eight inches deep and mulched well in the autumn.

Plants can’t read

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Cyclamen hederifolium

The books all say that Cyclamen hederifolium (ivy-leafed cyclamen) blooms late summer into autumn, but most of my plants started flowering just before the solstice.  At this time of year, there’s so much else going on in the garden that it’s easy to overlook these little pink flowers in the darkest spots under the deciduous canopy.

The easiest orchid?

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Bletilla striata. Typical pink flowered form.

People who don’t grow orchids often consider them to be difficult.  People who do grow orchids sometimes feel the same way about terrestrial orchids, particularly hardy species.  Your average orchid grower is perfectly happy messing around with ultrasonic humidifiers, high tech fertilizers, and complex potting mixes containing exotic and expensive materials, both organic and inorganic, in an attempt to grow a delicate little epiphyte from Borneo or the Peruvian cloud forest.  But give them an orchid that grows in the ground outside, and they are at a loss.

Bletilla striata, the Chinese ground orchid, is one species that defies the expectations of both orchid growers and those who just admire orchids from afar.  It’s a terrestrial orchid that is very easy to grow, and given a modicum of care it will steadily increase in size until you have a huge clump to impress your friends.  If you can grow a daffodil, you can probably grow Bletilla.

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My five-year old clump of Bletilla striata grown from a single pseudobulb in a 3-inch pot.  It probably clashes with the red  Aquilegia canadensis and lavendar Iris tectorum that grow all around it, but no one ever accused me of having good color sense.

According to IOSPE, Bletilla striata is native to China, Korea, and Japan (people in the latter nation might have something to say about calling it the Chinese ground orchid).  I’m not sure where in its fairly wide native range the plants in cultivation originate, but they are certainly cold hardy. My plant has easily survived 5 F (-15 C), and the species is reported to be hardy in USDA Zone 5 (-10 to -20 F, -23 to -29 C winter minimum) with protection.  My plant is growing in my standard mix of native clay and permatill, top-dressed with hardwood mulch, but any reasonably well-drained, slightly acidic garden soil would probably be fine.  Morning sun and some afternoon shade will provide sufficient light for flowering without scorching the leaves.

The flowers are relatively short-lived and don’t have the greatest form, but the buds open successively for several weeks.  In addition to the standard pink form, there are alba (white-flowered) and coerulea (“blue”) forms.  Several clones with variegated leaves are also widely distributed.  This spring, I obtained several pseudobulbs of an alba clone at a very reasonable price from one of the big bulb vendors.  I’ll be interested to see if it grows as easily as the typical form.

If Bletilla striata has a flaw, it is its eagerness to grow in early spring, at least in our mild climate.  The pseudobulbs are fairly close to the soil surface, so they warm up quickly and often initiate new growth in February, long before the last freezing weather.  Although dormant plants are very cold hardy, the new leaves, and especially the flower buds which emerge simultaneously with the leaves, are very sensitive to frost.  Leaves will continue growing even if the tips freeze, but frozen buds mean no flowers until next year.

This past winter, we had very warm weather in February, and new growth was well under way when a low of 25 F (-4 C) was forecast.  In an effort to save inflorescences that were already starting to emerge, I covered the entire clump with a black plastic cement mixing tub and several inches of mulch.  I keep several of these sturdy tubs around to serve as water reservoirs for potted bog plants, and they are also very useful for covering tender plants.  After several days, I removed the tub so that the new growth wouldn’t rot in the humid darkness and then replaced it again when more freezing weather was forecast.  The procedure was labor intensive but worked perfectly, and this year’s display of flowers is probably the best yet.

Calanthe update

In my post about Calanthe sieboldii, I mentioned that the hybrid Calanthe Takane was in bud.  The flowers are now open, and I am quite pleased.  C. Takane is a cross of C. sieboldii and the much smaller and less colorful, but hardier, C. discolor.  My C. Takane shows its parentage in the yellow lip (from C. sieboldii) and reddish brown sepals and petals (from C. discolor).  It is intermediate in size between its two parents.  Take a look:

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Calanthe Takane (C. discolor x C. sieboldii)

Pulmonaria ‘Trevi Fountain’

Pulmonaria ‘Trevi Fountain’ is currently blooming in the garden.  Its flowers attract the early carpenter bees, when they aren’t too busy trying to bore holes in the side of our house.

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Pulmonaria ‘Trevi Fountain’

For a long time, I ignored lungworts.  They’re from Europe, which to me suggests a plant that probably won’t be happy during our summer, and they are reportedly subject to mildew in hot, humid weather.  Indeed, by late spring, the potted plants at local garden centers often look fairly ratty.  But a couple of years ago, I ran across Pulmonaria ‘Trevi Fountain’ and was hooked by its beautiful blue flowers and the claim that it is heat tolerant and mildew resistant

Pulmonaria ‘Trevi Fountain’ is a hybrid of Pulmonaria longifolia ‘Bertram Anderson’ and Pulmonaria ‘Marjery Fish’ which is variously listed as either a selection of Pulmonaria vallarsae or a hybrid with P. vallarsae in its background.  P. longifolia is from western Europe–Britain south to Spain and Portugal–while P. vallarsae is from Italy.  Whatever mix of genes P. ‘Trevi Fountain’ inherited, it adapts well to the North Carolina piedmont.

In my garden, it starts blooming in February and continues into late spring.  The leaves wilt in hot sun, but as long as the soil is moist, they perk up again in the evening.  As advertised, they do seem to be mildew resistant. I have several plants in parts of the garden where they receive afternoon shade, and the foliage looks pretty good year round.  In winter, the leaves collapse and lie flat on the ground, but they nevertheless add interest to barren flower beds when all the bulbs and most of the other perennials are sleeping snug under the mulch.  By late January, new leaves start to emerge, and the old foliage dies back.  So far, P. ‘Trevi Fountain’ shows no inclination to be invasive in my garden, and it plays well with native woodland species like Arisaema triphyllum, Spigelia marilandica, and Aquilegia canadensis.

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The color of Pulmonaria ‘Trevi Fountain’ flowers is difficult to capture. To the eye, they are more blue than they appear in this image.