Sunday, 16 September 2012

3 Prettiest Things: Mid-September




 I've been exclaiming over my white 'Immortality' irises all week.  They're blooming for the second time since I planted them and I am beyond excited to see these spring favorites again in early fall.  I love their wide blue-green leaves.

Also looking amazing is my sweet autumn clematis:



It's all over the iron railing, is smothering the top of the parapet wall and is starting to spill over the front facade of the red brick building.  It's the first roof garden plant that you can see from street level.  Rock star!

My third favorite plant right now are my 'Honorine Jobert' anemones.



They've been blooming for a couple of weeks now and are going strong.  The shape of the flowers is so pretty - I especially like their orange anthers - but the petals and stems also seem quite sturdy.  I have five plants and am looking forward to finding out how much they grow from season to season.  Then I'll be able to give in to my temptation to cut some of them for indoors without diminishing the display in the garden.  (They have lots of buds but the flowers only seem to open a few at a time.)

Saturday, 15 September 2012

Fall 2012 Plant Order for the Roof Garden, Part 2

Consider this the "vines" edition. 

For the shady brick wall near the arbor and chaise lounges, I chose decumera barbara (Wood Vamp), a native version of climbing hydreangea:


It flowers white in the spring and is self-clinging, so it will be one less vine to train.

I also chose a pair of clematis to try to soften the same wall: clematis montana grandiflora, which tolerates shade


and clematis 'Candida':


(I had wanted 'Henryi' but it was sold out.)

For sun, since 'Mint Crisp' hasn't flowered this year and I'm getting impatient for the scent of honeysuckle, I bought a second honeysuckle Lonicera japonica 'Aureoreticulata':


Again, it was a back-up choice, after a honeysuckle named "Sweet Sue", which was sold out.  I have a suspicion that the variegated foliage might make 'Aureoreticulata' a better choice for me anyway.

I also ordered a golden hops vine (humulus lupulus 'Aureus') for it's vivid foliage and larger leaf size:


I want the climbers on the left hand side of the garden to lend a little more interest from their leaves.

And I decided to roll the dice and order 3 Clematis cirrhosa, which are evergreen winter-blooming clematis that are marginally hardy in my zone:


So delicate and pretty!  I might plant two in the garden and keep one indoors.  I'm worried they won't make it but find the possibility of flowers in the dead of winter much too tempting to resist.

Thursday, 13 September 2012

Fall 2012 Plant Order for the Roof Garden

I pulled the trigger today on my fall plant orders for the red brick building's roof garden.  There were some last minute additions, deletions and substitutions because a couple of items were out of stock, the shipping on one item was three times the price of the plant itself and I needed to meet certain minimum amounts for shipping at a couple of nurseries.  Here's what I ended up choosing.

Most exciting to me was the order I placed for five Osmanthus fastigata



I am decidedly obsessed with plants from the olive family, though it's tricky to find ones that will survive in zone 6.  This plant allegedly does, and I absolutely flip for the fragrance of osmanthus.  Their destiny is to become an evergreen hedge on the left side of the patio and to bloom in late fall/early winter, wafting their fragrance towards me whenever I dare to poke my head outside.

For hedging on the right side of the patio, I ordered a mixture of shrubs and made a last-minute substitution that I hope I won't regret.  The substitution was Hibiscus syriacus 'Jeanne D'Arc' instead of Deutzia x magnifica.  Here's Jeanne D'Arc:



I got freaked out that the deutzia was going to be tiny and take eons to grow.  Plus there was a minimum order amount that I was pretty far from reaching.  The hibiscus, meanwhile, is a large shrub type, not the kind of hibiscus that dies back to the ground in winter.  It is allegedly leggy, so I will need to find it a friend to camouflage its ankles and calves.  What appeals to me is that it's a late summer bloomer (I feel like the garden is lacking in flowers then), plus I was able to find a large size plant (or at least a large size pot!) so hopefully it won't be an eternity before the hedge has some height to it.

The second member of this informal hedge is Sambucus nigra 'Laciniata', which is the elderberry with cut leaves reminiscent of a Japanese maple that I described in my last post:


The third member(s) of the hedge is the Elaeagnus that I also described in my last post, but I got a bit freaked out that the variegation, while interesting, would add an unpleasant amount of yellow to my white garden, so I *also* ordered a plain, un-variegated version of the same olive family member.  Here's the plain Elaeagnus pungens:



Maybe a bit basic, but an effective screen, evergreen, and don't forget those highly fragrant late fall flowers.

The fourth plant for the hedge is going to be my already established Rosa moschata 'Nastarana' (Persian Musk Rose).  I did a little research, and though she's maaaybe 2ft tall now, she's supposed to grow to between 6 and 12 feet:


There's a corner behind the star magnolia's planter that turned out to be much shadier than I'd anticipated.  Two fancy double white geraniums met their Maker there, though the Japanese painted fern that I replaced them with as a (lack of) sun test is doing fine.  For that spot, I ordered a Sarcococca confusa ('Christmas box' or 'Sweet box'): 


It's a shade evergreen shrub that grows to between 2 and 4 feet tall and puts out fragrant flowers in the dead of winter.  We shall see!  (I love the idea of having something luscious to cut and bring indoors in winter.)

The last two non-vining plants I ordered for the roof garden were apple trees.  Yes, you read that right.  In my travels around the internet, I came across so-called "Colonnade" (or columnar) apple trees.  They are basically flowering, fruiting poles, that can grow to 12ft under optimal conditions.



I chose the cultivars 'Red Sentinel' and 'Golden Sentinel', both of which are supposed to flower white in spring and then produce normal sized apples in the fall.  I plan to put them on either end of my white lavender hedge, in order to provide more of a green frame for the sunroom windows.  Fingers crossed that they're gown in pots rather than in the ground, because otherwise they won't ship until the spring.

I'm quite planted out now so I'll post about the vines I ordered tomorrow.

Tuesday, 11 September 2012

A mixed hedge

Yes, I've been quiet for a while, but not because I'm not working on improvements to the red brick building.  I've been trying to put together my fall orders of plants for the roof garden for the past 2 weeks but still don't have it finalized.  The hold-up is the mixed hedge I want to put in on the right hand side of the garden. 

Initially I was planning to put in a row of plants that would grow to about 4 feet tall, but as I've reflected on what is and isn't working in the garden, I've come to the conclusion that I need more of a feeling of enclosure...in addition to more structure.  So all my lovely 4ft tall shrub selections had to be tossed and I've been scouring gardening books, magazines and the web to find interesting choices that will grow to between 6 and 8 feet tall - and not take an eternity to do it!

I feel like 4 good picks will be sufficient.  So far I've got sambucus nigra 'Laciniata', which is a cut-leaf elderberry that produces white flowers in the spring, black berries in summer and has butter yellow foliage in fall:



I'm also sold on elaeagnus pungens 'Clemson Variegated', which has glossy green and yellow variegated evergreen leaves and puts out tiny highly fragrant white flowers in October and November:



Some sources say it's only hardy to zone 7 and others say it's hardy to 6, so fingers crossed that it'll be hardy in the red brick building's garden.

My third plant choice is deutzia x magnifica, which is a profuse white bloomer in June and July but doesn't do anything else the rest of the year. 



The flowers are gorgeous so I'm hoping that's enough for me to feel like it has earned its keep.  I'm also concerned about whether it's a fast enough grower.  I'm finding that deutzia gracilis 'Nikko' isn't for me.

My fourth plant choice is the biggest challenge.  I'm leaning towards Ribes sanguinem 'White Icicle', which flowers white in spring, then puts out black berries in summer before turning yellow in the fall:


I've also got my eye on a couple of larger viburnums, but they just don't make my pulse quicken.  Same with rhododendrons.  A hydrangea could be a possibility if I could find a sufficiently intriguing cultivar, and one that doesn't add too much non-white color before autumn.  Another option I have is to move either my star magnolia or my mock orange out of its planter and line it up in the hedge.  I'm a bit loathe to disturb them, though, since they've taken a while to get their bearings.  Looking again to my garden for hedge candidates, my Persian shrub rose 'Nastarana' is just about where the future hedge is supposed to go and has been performing brilliantly ever since I planted her back in early summer.  So I *could* try incorporating her into the hedge as my fourth shrub...

I'm surprised by how challenging I'm finding this.  Until I've got the mixed hedge worked out, I'm holding off on all the other fun plants I want to order, so as not to place than one order from each nursery.  I'm excited to share some of those goodies with you soon.



Wednesday, 29 August 2012

Heather in containers

As September approaches, I've been thinking about changing the plants in the urns on my balcony.  There are still flowers, but not as many as I'd like and the display doesn't look tall and bushy enough. 

Researching container options for fall/winter, I came across a nursery that specializes in heather.  Wow! I had no idea it was such a colorful winter bloomer and that literally hundreds of varieties are available.  I immediately went into research mode, trying to create a short list of my favorites.

I'm eyeing Erica x darleyensis 'Dunreggan':


Erica x darleyensis 'White Perfection':


Erica carnea 'Golden Starlet' mostly for its foliage color, a bit for its growth habit:


Erica carnea 'Lake Garda':


and Erica carnea 'Clare Wilkinson':


I tried to find plants that would bloom white in winter and grow as tall as possible, while avoiding the true heathers (Calluna vulgaris) because they need acid soil which might upset their container-mates.  (I'm not sure who those container-mates will be at this point, but I'm trying to keep my options open.)  Unfortunately the tallest genus and species is only hardy to Zone 7, which of course is too tender for a container garden in Boston.  I also chose a couple of heaths that bloom pale pink or purple because I have a feeling that in January, February and March (but not before then!), I'm going to want to see a little color peeking out from amid the green and white.

I can't believe I've never considered heathers for the winter garden before and I wonder why aren't they more discussed.  From what I've read, they would really like the growing conditions at our beach house too.


Sunday, 26 August 2012

An arched hedge entryway for the roof garden

Last week while studying the roof garden, I decided that what the right side needs is an evergreen hedge with an arched entryway cut into it:



I'm craving more of a feeling of privacy on the side of the garden, so if the tall evergreen hedge doesn't do it, I might even add a door:



The hedge would run along the edge of the patio, perpendicular to the new boxwood hedge I just planted.  It's a really short span, so I might need as few as 5 plants. 

I did some research to find the best type of evergreen shrub for the job.  First of all, I had to take into account the tiny size of the garden, the lack of much soil depth for roots, the weight load restrictions and the fact that the garden is in Zone 6.  Ideally, the shrub would grow quickly to about 8 feet and max out at a depth of about 2 feet.  I like the look of Italian cypress, but of course it's too cold to survive here.  I did decide that something dark green and glossy would be best. 

Right now I'm looking at 'Sky Pencil' holly:


'Graham Blandy' boxwood:


And 'DeGroot's Spire' arborvitae:


It's pretty confusing because the height that each is supposed to grow to changes depending on who you ask.  For my purpose, the difference between 8 feet and 15 feet is huge.  I want a lush, robust-looking hedge, but I don't want a giant that's going to get out of control.  Also, I want something fast growing to its mature height because I'm impatient.  I'm going to pay a visit to my local nursery and see what they've got.

Friday, 24 August 2012

Boxwood bonanza

I went to Home Depot yesterday to pick up some hooks, eyes and epoxy to make trellises and install guide wires for some of the roof garden's climbers.  Naturally, I couldn't resist a look in their nursery.  I was happy to see that they had a sale section with plants marked down to $4.  Among the sale plants were some small "Green Velvet" boxwoods.  I've been thinking about planting a boxwood hedge for the past month but the cost made me hold off in the hope that as other plants grew in, the boxwood wouldn't seem as necessary.  At $4 a pop, I loaded the ten healthiest plants into my cart.  I'm a strong woman but I can't resist a crisp and classic evergreen hedge for the price of a bouquet of cut flowers. 

The spot I had in mind for them was along the front edge of the stone patio.  I'd deliberately gone for something much more free form at the beginning of the season but for the past week or two it's just been looking like a mess. 


I think I need a little more structure, even if I then rough that structure up around the edges.  The sweet peas were on their last legs and the plants I selected weren't tall enough for the space.  I want to cover the beige part of the wall at a minimum, but probably have something that goes up as high as the top of the parapet wall, covering the black aluminum flashing.  (The boxwood is about 12" tall at the moment, needs to be about 18" to cover the beige part of the wall, and 24" to be level with the top of the parapet.  According to the label, 'Green Velvet' grows slowly and tops out at 3ft.)  Evergreen is a big bonus because the patio is front and center in the winter.  In the photo above I'd already torn out a big clump of sweet peas from the left (see foreground) before I thought to take a "before" picture.

It took a while to relocated the plants that were doing well, once the sweet peas were out.  The heuchera 'Caramel' rejoined its friends on the right side of the garden, the languishing epimedium 'Bandit's were re-situated in what I hope is a shadier place, etc, etc.  Here's what the area looked like once I cleaned it out:




Then in went the bargain boxwoods:




My idea is to ultimately train some climbers on the railing behind the boxwood hedge and tuck some small white annuals or perennial white perma-bloomers in front of it for constant color.  As you can see, my Clematis 'Sweet Autumn' is already encroaching nicely on the iron railing from the right hand side.  Maybe a large-flowered early-blooming clematis on the left?  By next summer I also hope to have a long, narrow high top dining table and chairs on the patio in front of the new hedge.