Great Shrubs

Great Shrubs

I’m a fan of shrubs. I love the layering that they provide. You can find these woody-not-trees-plants in all shapes and sizes, all colours–well, most colours–, evergreen, deciduous, in-between…

One thing about most shrubs, is that altho’ they may tolerate pruning, few of them will thrive if you try to fit too large a shrub into too small a space. So the following shrubs should not be assumed to fit into just any garden anywhere. You’ll see I’m doing some creative shaping, but always from the perspective of allowing the plant to grow to it’s preferred height.

Sambucus nigra ‘Black Beauty’ (aka Black Beauty Elderberry)

A large deciduous shrub with colouring that’s hard to beat, it looks best in the first half of the growing season, with the rich deep burgundy leaves, and then these amazing umbrellas (“umbels”) of pink flowers. You can harvest the flowers for elderflower cordial, or leave them and harvest the berries for elderberry jam or cordial. If you have the patience.

Sambucus nigra ‘Black Beauty’  June 21 this year

Sambucus nigra ‘Black Beauty’

Sambucus nigra ‘Black Beauty’ today

I want to let it grow tall–maybe not to its maximum size–saw a 20′ tall one in Langley a couple years ago!– but nice and, you know, tall. But in the top picture, it’s taking up a lot of space–about 8-9′ diameter. So I decided to limb it up, developing it tree-form. And lo and behold, a new planting bed! And who doesn’t need more planting space?

You can see that it’s not as pretty as it was in the June picture above–the leaf colouring is fading a bit in the heat and drought. But I don’t mind–I know it will be amazing next year again, and probably later on when it gets colder and wetter. I’ll probably also take out a little more of the lower growth next Spring when it’s actively growing.

Ceanothus thyrsiflorus (California Lilac)

This California native predictably likes heat and dry conditions, but doesn’t at all mind our wet winters here in coastal BC.

This is Karl Rosenfield peony in front of Ceanothus thyrsiflorus ‘Victoria’ (California Lilac)

Last winter’s unusual snow cover caused quite a lot of die back on my Ceanothus, so since it was already thinned out naturally, I decided to give it the same treatment as the Sambucus–limbed it up to tree form. (“Arborized” it.)

Ceanothus thyrsiflorus ‘Victoria’

 

Ceanothus thyrsiflorus ‘Victoria’–tree-form

Again, not looking its best, being past bloom time, but look how it reveals the red Lucifer Crocosmia, the pink no-name mallow, and the yellow daylilies, all of which were pretty much buried couple hours before this picture was taken.

Berberis thunbergii ‘Concorde’ (Japanese Barberry)

Berberis thunbergii ‘Concorde’

I have an awful lot of “favourite” shrubs, and this is one of them. Not to say it has no faults, but its virtues outweigh them. It’s deciduous–nothing wrong with that, but when the leaves are gone, the branches look really dead and thorny. But thenwhen it starts to leaf out in the early spring– earlier than many deciduous shrubs, happily–it seems to fill out overnight! And then there’s the delightful yellow flowers–what a contrast! And new growth has a fiery glow to it as you can see in the pic above.

I don’t seem to have taken a picture of my Barberry in bloom, but this is a sweet little hedge of Royal Burgundy Barberry belonging to a client–with a little winter damage, unfortunately.

Berberis thunbergii ‘Concorde’

Kalmia latifolia (Mountain Laurel)

I have a couple Kalmias, and I have to admit that neither of them are in the best condition. But I acquired them under less than ideal circumstances, so I’m hoping a little TLC will improve their habit and growth.

Kalmia latifolia ‘Kaleidoscope’

Kalmia latifolia ‘Kaleidoscope’

This evergreen beauty–just look at those flowers!–stays diminutively small, but the still-fairly-ugly ‘Olympic Wedding’ will grow to 5′. If it grows. I’ll just show pics of the flowers, which are stunning:

Kalmia latifolia ‘Olympic Wedding’

And one last, for now…

Hydrangea arborescens ‘Incrediball Blush’

Hydrangea arborescens ‘Incrediball Blush’

This really is as floriferous as it looks. Main problem is that despite the growers’ insistence that the Incrediballs have stout stems, they don’t have stout enough stems to hold up those giant flower heads. One light rain the other day put a bunch of the blooms on the ground. But I think Hydrangeas in general are among the coolest shrubs ever. So many varieties, different growth habits, flowers, colours…

This little Panicle Hydrangea is I think ‘Brussels Lace’, with these starry flower heads.

Hydrangea paniculata ‘Brussels Lace’–the nursery websites say it grows to 6′-12′ (hardly seems possible!). Mine is about 5 years old and just about reaches my knees!

Stay tuned for more on Spirea, Boxwood, Irish Yew… I have a lot of faves!

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Propagating Your Favourite Shrubs

I read an article the other day about propagating shrubs from  softwood cuttings, which inspired me to have a go.

Sambucus nigra 'Black Beauty'

Sambucus nigra ‘Black Beauty’

I have two Sambucus nigras— a ‘Black Lace’ and a ‘Black Beauty’. The ‘Black Beauty’ has been wonderful–dark foliage, a lovely shape, and beautiful umbrella-like pink flowers in the late spring.

Sambucus nigra 'Black Beauty'

Sambucus nigra ‘Black Beauty’

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‘Black Lace’ should be the same except with lacier leaves, but for me it’s been horrible, shapeless, gangly branches that are more like a climbing rose than a regular shrub, and this year it’s been constantly covered with black aphids–my most detested pest. No amount of blasting with water inhibited them and there weren’t any lady beetle larvae gobbling them up. In the end, I decided it wasn’t worth keeping, so I chopped it down and when I get around to it, I’ll dig up the stump. (Have to admit here that I saw a friend’s ‘Black Lace’ on Saturday and it was  beautiful!)

Now I want another ‘Black Beauty’ to fill the spot. What a perfect time for the inspiration to propagate with softwood cuttings to strike. Thanks Gardener’s World for the tutorial.

So now readers, you get my tutorial: I’m going to try to increase my stock of Sambucus nigra ‘Black Beauty’ and show you the steps as I go along.

1. First problem is finding the softwood cutting. According to the article your cutting should be a non-flowering lateral shoot, this year’s growth, and neither very young nor old enough to be woody. Hmmm, non-flowering. Almost all the branches were flowering branches.

Sambucus nigra

Sambucus nigra ‘Black Beauty’ softwood cuttings

These are the cuttings I’ve chosen, but only one of them is “non-flowering”.

Sambucus

Sambucus nigra; this one had no flowers on it.

I didn’t spend an awful lot of time examining the branches to find ones that were non-flowering, mainly because every one (but one) looked like the shoot below:

black beauty cutting 1

Sambucus nigra. Initially it looked like a non-flowering shoot, but looking more closely I saw the stump where the flower stem fell off.

Never mind. I’m going to use them all, and if only one grows roots, all I really need is one. The “softwood” part is a bit subjective: Gardener’s World didn’t define “softwood”, so maybe it’s not critical to get that exactly right. Susan Grillo from Fine Gardening defines softwood as mature enough to snap off when bent over. Too immature and it just bends, and too mature doesn’t snap because it’s too woody. I didn’t really test mine; I think they’re pretty soft, but too bad. The concern with too immature is they don’t have the structure to stay alive long enough to get roots. If mine collapse and rot, I’ll just try again in another month or so.

2. Roots are going to grow from the area just underneath the outermost layer, because that’s where the growth hormone that stimulates root growth lives. So I’m going to do two things: strip the bottom leaves off, leaving a little “wound”, and scrape a little bit of bark at the bottom tip.

This pic is a bit fuzzy, but only realized it after I'd planted up all my cuttings.

This pic is a bit fuzzy, but only realized it after I’d planted up all my cuttings.

3. Next thing is rooting hormone: this is the same hormone that the plant produces naturally, so by applying some, we’re just giving the cuttings a bit of a boost. Sort of like an energy drink.

Rooting Hormone.

Rooting Hormone.

I’ve read somewhere that rooting hormone (usually in powder form, altho’ mine is a gel) is only fresh for 6 months and after that should be replaced. Mine is at least a couple years old, and doesn’t have an expiry date on it. So I’m using it.

Ucky green gel--looks a little like slimy algae!

Ucky green gel–looks a little like slimy algae!

Most package instructions say to dip the cutting in the rooting hormone, but I poured a little into a saucer so that, if there’s some bacterial or fungal contamination, it won’t get into the bottle.

4. Planting: This is the easy bit–well, it’s all been easy, once you know how. Seedling potting mixture, dampened, not drenched, dib some holes with a pencil, tuck in the cuttings.

Seedling potting mixture

Seedling potting mixture in a 4″ pot.

Holes for the cuttings.

Holes for the cuttings. Four cuttings, four holes.

All tucked in for bed.

All tucked in for bed.

A couple of things to notice in the picture above: I cut all the leaves in half to reduce the amount of moisture that the leaves breathe out (“transpiration”). But the leaves are still photosynthesizing (making energy from the sunlight), so which does the cutting need more: energy or moisture? Don’t know the answer to that, but almost every source says to cut the leaves in half. So I did.

The other thing to notice is how slumpy the cuttings look. It’s recommended that the cuttings be taken early in the day so they have maximum moisture. I cut mine at 4 pm, at just about the hottest part of the day, just about the hottest weekend we’ve had in this hot dry year. Not optimal. But I’ve heard it said that the best time to do something is when you have the time and inclination. That’s when I had the time and inclination.

But now there’s one last step, and it also has to do with moisture:

Nope, not trying to suffocate my babies.

Nope, not trying to suffocate my cuttings.

Cover the whole pot with a plastic bag, secure with a rubber band, and inflate it with a straw (or put a couple chopsticks in the pot) to keep the bag off the leaves. That maintains  humidity, again helping to prevent the cuttings from drying out before they have a chance to put out roots and begin to fend for themselves.

Now we wait. And watch. I’ll check the potting soil for moisture every few days, look for any fungal growth that would signal the death knell, and then in a few weeks I’ll give a gentle tug on the cuttings to see if they’re growing roots. If there’s resistance, there’s probably roots, so I’ll leave them a little longer until there are roots growing out the bottom holes, and then divide and pot up individually. I’ll keep you posted.