Three Neat Plants

Barbarea vulgaris 'Winter Cream' ('Variegata') May 9 10

I enjoy watching early wildflowers emerge and seeing beautiful displays of bulbs in other people’s gardens, but I seldom bother with planting anything for spring interest in my own garden. Still, in the process of collecting cool foliage and experimenting with unusual species, I’ve ended up with several intriguing early bloomers over the years. So, here are few for a special spring edition of Three Neat Plants.

Yellow rocket (Barbarea vulgaris), also known as winter cress, is a common field weed here in Pennsylvania, and it occurs in almost every other state as well. The variegated version of this biennial, however, known as ‘Variegata’ or ‘Winter Cream’, is anything but common. It’s easy to start from seed, and during its first growing season, it forms a tidy rosette of bright green leaves that are heavily splashed with creamy yellow. The ground-hugging rosettes remain attractive through the winter, looking much like an ajuga.

Barbarea vulgaris 'Winter Cream' ('Variegata') May 9 10

Early the following spring (usually April), the rosettes send up flowering stems to about 1 foot tall, carrying clusters of small, soft yellow flowers until mid- to late May.

Barbarea vulgaris 'Winter Cream' ('Variegata') May 9 10

The plants set a generous amount of seed and self-sow readily, so I usually let just one or two stalks set seed, then shake the ripened pods where I want new plants to grow. Cutting the spent flower stalks off of the other rosettes as soon as the flowers are done encourages them to produce new leafy growth, so they act more like a perennial than a biennial.

Barbarea vulgaris 'Winter Cream' ('Variegata') May 9 10

Besides being pretty, variegated winter cress is edible. So once you get a patch established, you can pick some of the leaves for cool-season salads. Variegated winter cress thrives in average to moist soil in full sun but can take light shade too. Seeds are available from J.L. Hudson, Seedsman (in the U.S.) and Plant World Seeds (in the U.K.).

Corydalis nobilis April 11 10

Next up, Corydalis nobilis (for want of a better common name: noble fumitory). I’ve pretty much gone off corydalis altogether after over a decade of trying to eradicate another unusual species – C. ochotensis – from my last garden, and now this one. (Boy, do I regret trying so hard to get it in the first place.) C. nobilis, though, has been in my life for over 20 years now – it’s one of the very first plants I included in my first real garden – and it’s been nothing but well-behaved. I wish it would seed around a little bit more, in fact.

The deeply cut, blue-green foliage emerges as soon as the soil starts to warm in March, eventually forming a mound about 1 foot across. In April, dense clusters of bright yellow flowers, each tipped with a deep red dot, open just above the foliage, for a total height of about 1 foot.

Corydalis nobilis April 11 10

It’s a nice show for maybe two weeks, then it’s over just as quickly, as the plants go dormant again by mid-May. That makes it a great companion for grasses and hostas, because it’s pretty  much gone by the time its partners start to fill out. It likes a spot that’s sunny in spring. I’m not sure how well it adapts to different soil conditions, but it seems quite happy here, where the soil is on the heavy side and usually somewhat moist, though often dry in summer. Seeds of Corydalis nobilis are available from Gardens North.

Chaerophyllum hirsutum 'Roseum' May 2 10

There aren’t many umbel-form flowers for spring, so Chaerophyllum hirsutum ‘Roseum’ (sometimes called pink cow parsley) makes a nice partner for other mid-to late spring bloomers – especially those with large, bold blooms, such as tulips, irises, and peonies. Like the corydalis, it’s an early riser, forming loose mounds of hairy light green, deeply cut leaves in March.

Chaerophyllum hirsutum 'Roseum' April 20 10

In April, the somewhat sprawling flowering stems are topped with domed clusters of many tiny blooms, to about 18 inches tall. They’re rosy pink when new, especially when temperatures are cool; sun quickly bleaches them to a very pale pink to near-white.

Chaerophyllum hirsutum 'Roseum' May 8 10

For me, pink cow parsley puts on its best show from late April through May, but I understand it can flower for another month or so in cooler areas. It sets lots of seed and apparently can naturalize readily. I usually remove the spent flower stems but allowed them seed last year. This spring, there are a whole lot of unidentified seedlings nearby; they don’t quite look like I’d expect, so I’m not sure they’re from this plant, but if they turn out to be the same thing, I’ll be hesitant to let it set seed again.

Chaerophyllum hirsutum 'Roseum' with Amsonia hybrid May 5 10

The foliage sticks around through the rest of the season but is kind of limp and tired-looking when the weather starts to get hot. Cutting the whole thing to the ground in June encourages fresh new growth, though it’s not at all eye-catching. It’s basically a space-filler for the rest of the growing season, so I don’t recommend giving it a prime spot at the front of a sunny border, as I have. Because it can grow well in partial shade too, I’m thinking it would be nice for early color under deciduous trees, mingling with the bold, leathery foliage of Lenten roses. The only seed sources I could find are both in the U.K.: Special Plants and Chiltern Seeds. The closest plant source, as far as I know, is Fraser’s Thimble Farms in Canada.

5 responses to this post.

  1. These flowers are beautiful spring blooms — what is that gorgeous bluish bloom with the pink cow parsley, or is it more of the parsley, bleached a different colour by the sun? Really pretty.

    Oops – I meant to mention that: it’s a bluestar (specifically, a seedling cross between A. hubrichtii and A. tabernaemontana).
    -Nan

  2. Posted by Sylvia on May 13, 2010 at 8:27 am

    Nan, three more neat plants! The one I want this time is the Yellow rocket or winter cress. You sold it to me when you said it looked like ajuga, over the winter. I have just the place for it as well, where I had been thinking that a yellow spring flower would be good. Mixed with purple alliums if they flower together. Now I just need to decide on some other seeds to make it worth placing an order. Oh! and not to bring too many plants back from holiday or I will not have room.

    Best wishes Sylvia (England)

    Yes, it looks great as an underplanting for purple alliums. It’s blooming now with Allium aflatunense.
    -Nan

  3. Nan, thank you for always featuring interesting and not so common plants. I personally like the Corydalis and have put it on my list of plants to look further into.
    Lene

    It’s a winner on two counts: it’s showy in bloom and then makes itself scarce. Oh, and it needs no maintenance – not even cleanup. It’s definitely worth hunting for.
    -Nan

  4. I’ve never tasted cress. I’d be willing to give that gorgeous variegated one a try.

    It’s not all that distinctive – a little peppery sometimes – but it’s good when there’s not much else fresh during cold weather.
    -Nan

  5. Posted by Monique on May 25, 2010 at 12:08 am

    Hi, I also enjoy Chaerophyllum hirsutum ‘Roseum’ in my garden. Thanks for the great photos. I got mine through Heronswood nursery a few years ago and it is still available.

    My plants are in part shade and the foliage stays fairly decent after blooming for the remainder of the year.

    Thanks for that tip, Monique. As I suspected, mine gets more sun than it would like, and that’s why its foliage gets tired-looking. I bet the pink color also stays richer in some shade.
    -Nan

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