Archive for New Improved Plants

Tips to succeeding with Manzanita in Portland Residential Landscapes 

Tips to succeeding with Manzanita in Portland Residential Landscapes 

Drought tolerant landscaping in Southeast PortlandManzanita (called Arctostaplylos – Arc toe staff eye loss) is the new cool darling plant here in Portland. The reasons why are numerous, unique “new” plant, drought tolerance, attractive in winter and all year, and there are now many diverse shapes and sizes to work with that will survive here. Years ago I only used this plant for a plant collector garden because they knew it was a crap shoot as to whether it would survive at all.   

As a Portland landscape designer I want plants that will serve many purposes in my designs. For people who are done with the overuse of Rhododendrons and Azalea and want drought tolerant plants, Manzanita is the perfect plant. Before you fall in love, I want to give you some tips for succeeding with Manzanita in Portland. They have requirements that must be met if you want them to thrive. 

Please see my previous blog “Portland Landscape Designer Advocates use of Manzanita in Xericscapes”.

Tips for succeeding with Manzanita in Portland 

Select the right site, conditions and plant companions 

Most are intolerant of summer water….clients must understand that they cannot coddle these plants, they cannot plant annuals with them for summer color, they cannot fertilize, they cannot water these plants after they are established or they will die.

Ground cover manzanita in Raleigh HillsPlant on a berm 

In many Portland landscapes planting on a berm will be necessary to avoid root rot. You will see bermed soil areas here even in parking strips. Portland parking strips (the 4’ wide ones) are a popular place for many of the new smaller types of Manzanita and for drought tolerant or xeric styled plantings. Most of the Manzanita I am using are too wide for a 30” parking strip. 

Planting companions

Planting companions must have the same no water requirements because it’s hard to remember not to water one plant and that you must water the one next to it. If any kind of auto irrigation is used the first summer it must be disconnected, dismantled, hell-dismembered so no one accidentally waters that second summer.   

I select companions from Mediterranean or NW native plant palettes. Some mid west native prairie plants also work well with Manzanita. Herbs, ornamental grasses and xeric perennials like Penstemon or ice plant are easy companions and Heather (Calluna Vulgaris types) are one of my favorite for texture contrast.  

Buy small plants 

Drought tolerant landscape design, manzanita shrub in North PortlandIt’s best to buy small plants and they will establish faster than a larger plant with a higher survival rate. Large sizes of these plants are not available anyway. Many of these plants will be available in a 4” pot or perhaps a quart sized pot. Smaller plants make more sense in this case but don’t expect them to be inexpensive. You are paying for all the research and extensive work to create these new plants. 

Select the right Manzanita 

The trial and error approach for picking which one to buy and where to plant it is going to be very frustrating. There are quite a few new plant types to pick from and some grow very fast, some slow. Some may be pruned hard because they have a burl (what’s a burl?) and others would be ruined with such treatment. Your Portland landscape designer needs to be an expert or have access to one. If you are on your own, buying from Cistus Nursery or the retail store Xera Plants, Inc. is the best way to get the expertise you need from their very knowledgeable staff.   

I talked to Alana Chau at Cistus Nursery. Here is her list of plants that will be available that I especially liked. 

 Arctostaphylos hookeri ‘Green on Black’  18” high and can handle some clay soil. 

Arctostaphylos × media ‘Martha Ewan’ is a nice size maturing at three feet tall and it can be tip pruned. It gets wide so give it room to be 4 or 5 feet wide. 

Arctostaphylos Stanfordiana ‘Mills’ or A x ‘White Lanterns’ both at 4’ tall 

Arctostaphylos Dr Hurd’ is a curvaceous 8′ to 10’ tall small tree and is planted at the entrance to Cistus Nursery 

Arctostaphylos  mewukka or Arctostaphylos patula can be pruned heavily. (They have a burl and once established they can be pruned back to the burl, for non horticultural nerds just know this means you could plant one of these closer to your walkway than many of the other varieties because the size could be controlled without ruining the appearance of your plant.) 

(We designers get excited about plants who fit into a small landscapes so we might be more excited that this burling option than you are). 

 My manzanita guru, Paul Bonine explains about burls in his article in Pacific Horticulture, Arctostaphylos for Pacific Northwest Gardens “Some Arctostaphylos species develop an enlarged area called a burl at soil level; new shoots emerge from the burl following fire or extreme drought, or from extensive pruning to rejuvenate a plant in the garden.”

Drought Tolerant Landscaping with Manzanita Plants in Portland

Drought Tolerant Landscaping with Manzanita Plants in Portland

Why am I excited about using Manzanita in my Portland landscape designs? 

Manzanita shrub in Arbor Lodge landscape - Landscape Design in a DayIt’s the water

To advocate the use of Manzanita is to advocate the use of drought tolerant plants. Happily we landscape designers are encountering more clients these days who want a low water landscape or want a completely drought tolerant yard. I can advise about the site conditions drought tolerant plants require and select attractive plants that meet the curb appeal test in addition to drought tolerance.   

Unique look 

Manzanita flowering in Woodlawn neighborhood of Portland - Garden DesignIt’s a new look for the landscape. My younger clients are done with  rhododendrons and azaleas, which are somewhat over used here. While Manzanita has attractive flowers, it is the whole package, foliage color, shape of plant, bark color and flower that is creating the popularity. I’m especially happy with the boost these plants give to the winter landscape. 

Fusion of modern style with NW Natural  

These plants are too naturalistic for formal landscapes but they look great with modern and craftsmen homes.  Style-wise Manzanita fit nicely with NW natural,  Mediterranean or even a southwestern look.  We get strong foliage contrast with  leaf blades (Yucca or ornamental grass), tiny needles like dwarf conifer,  heather (calluna type), lavender or fat leafed succulents like hens and chicks or sedum palmeri or other sedums.

New kinds of Manzanita to use in landscapes 

Drought tolerant Manzanita in Portland garden design as foundation plant.The fact that we now have more than one kind of Manzanita we can use can be laid at the feet of a handful of people who have crossed different kinds of Manzinita to produce plants that can thrive in our rich Willamette Valley soils.  They then tested the plant in different soil conditions and identified the plants that can handle life in an non irrigated garden or landscape.

When I started my Portland landscape design practice in the 1990’s there was a native Manzanita tree from the Oregon coast that “sometimes” survived here. They are so beautiful that I was tempted.  Still “sometimes” was not good enough for my designs.  I needed cold hardy Manzanita ground covers, shrubs, and small trees that would thrive here in the Willamette Valley and there weren’t any. Now I have them!!! 

Less weeding 

This benefit could take some time to realize.  Manzanita leaves contain a substance that discourages weeds. Leaves that shed from the plant should be left in place. It takes several years for these small leaves to build up enough of the substance in your soil to be effective. 

Pruning tip

Portland Residential Landscape DesignerrOne of the common mistakes with Manzanita is to underestimate the width of the shrubs and small trees. Most cannot be pruned heavily and can be rendered so unattractive by pruning that tries to contain them, they will be removed. If you have no pruning skills (and most people don’t) be sure to place these plants where they have room to mature with yearly tip pruning only. 

Where to find these plants? 

While Xera Plants, Inc. and Cistus Nursery are the primary resource for retail, there are the Hardy Plant Society Sales (spring and fall) and tried and true mail order plant resources. If you are wanting drought tolerant landscaping and need a landscape designer contact me, I love to design with Manzanita. 

 

Trees for Portland Residential Landscape Design in Woodstock neighborhood

Portland residential landscape design  in Woodstock

Young Japanese elm in Woodstock neighborhood

Trees for Portland Residential Landscape Design in Woodstock neighborhood

One September afternoon while in Portland’s Woodstock neighborhood I  drove by a former client’s home. My clients had moved, and I was curious to see how the design (installed a dozen years ago) had held up. Once clients move I rarely have continuance with the landscape.  

This drive by is a mixed bag.

Shade Tree for the backyard

Affordable Landscaping Portland design in residential Woodstock.

The shade tree for the back yard is absolutely perfect, and exactly what I had envisioned. This is the part of drive bys I like the best. I used a Japanese Elm – Zelkova serrata variety called ‘Wireless’ because it’s one of the few shade trees that is compatible with lawn and ‘Wireless’ is the perfect shape and size to provide shade for city landscapes.

Their leaves are smaller than most shade trees and allow dapples of sunlight through the canopy to the lawn while filtering out the heat. The exaggerated vase shape of the tree also allows light to come in under the tree in the morning and late afternoon.  This tree provides shade to the south facing deck and the back of the house. It will get over 30’ wide at the top. It matures at 25’ tall so it is a tree that will be wider than it is tall.

If you are a discerning shade aficionado you will say hmmm…… the shade tree doesn’t have low branches so how can you sit on the back deck and have dinner without being blinded by the south sun? We kept a mature mixed hedge at the back of the property and it will block those dinner hour sun rays. The shade tree will filter the hottest sun of the day.

Privacy Screen Planting for side yard

Residential Garden Design Portland, Oregon Woodstock neighborhood.Less successful is the privacy screen planting for the side yard.  I used a narrow variety of Hornbeam (Carpinus betulus ‘Franz Fontaine’) to block the view of the neighbor’s driveway and their vehicles and also to create an attractive view from the bedroom Affordable Landscaping Portland residential trees.windows. For the design to be functional, the Hornbeam would need to be pruned once or twice a year to become a 10’ narrow wall of thick leaves. The maintenance did not happen since my clients moved.  Now the side yard privacy screen is wildly out of scale and the charm is gone.

Make an appointment to start your Portland residential landscaping with designer Carol.

Success with Crape Myrtle in Portland Landscape Designs

Residential Landscape Design PortlandLandscaping with Crape Myrtle in Portland

I responded to a request for help from clients in Northeast Portland who were concerned their crape myrtle trees planted two years ago were not healthy because they didn’t flower. They had done their research on crape myrtle but unfortunately not from a source familiar with their trees cultural needs or growth patterns here in the Willamette Valley.

Let me knock a few myths out of the way to save you the same unease and help get our crape myrtle trees off to a good start.

  1. Crape myrtle are drought tolerant so don’t ever water them. Not so!

Latest wisdom is to water them deeply with a drip irrigation or soaker hose once every 10 days. Touch the soil with your hands down a few inches to ensure you are not over watering. It should be moist and then as you get closer to the time to water again it should be almost dry. When they have been growing for ten years in your landscape they might become very low water needs.

I like to design plant companions for the crape myrtle that have the same water needs. In this garden I have crape myrtle with Chinese Camellia – Camellia sasanqua ‘Yuletide’ and American Switch grass-Panicum virgatum ‘Shenendoah’. The clients added ground cover sedum.  None of the plants near the tree need to be watered more than once a week ever after except perhaps for their first summer. A splash of hose water once a week is not at all what I am talking about, I am talking about slowly applied water and preferably drip system or soaker hose.

  1. Fertilize if you want a lot of flowers, that’s true for all plants, right? Not so!

First off, nothing is true for all plants. There are plenty of plants that are harmed by fertilizer so tuck that behind your ear for a future conversation. We typically have fertile soil here in the Willamette Valley, so I would never fertilize crape myrtle beyond adding garden compost to the soil once a year as a top dressing. Adding fertilizer will work against your goal of having flowers.A  young crape myrtle in SE Portland landscaping.

  1. You must dead head (pinch off) all the spent flowers. No way!!

If I had to deadhead crape myrtle flowers, it would take a bazillion hours and eventually a ladder.  Nope, you don’t need to deadhead. When your tree is young, and you get a heavy crop of flowers you might want to thin out some flowers to prevent the young branches from breaking.

  1.  Flower timing will depend on our summer temperatures. True.

It’s got to be hot enough and stay warm even at night to kick off the flowering of crape myrtle here in the Willamette Valley. If we have a cool June which we do sometimes, the flowers will be delayed until it’s been warm enough for long enough. For a deeper dig into crape myrtle read what Paul Bonine says in Pacific Horticulture magazine.  He’s my expert! 

Sleep-Creep-Leap

These clients came from California, a climate where plants grow fast. They were not familiar with the saying “Sleep-Creep-Leap” which describes typical plant growth for the first three years.

A  crape myrtle in the late Portland summer. Photo by Carol LindsayOnce roots are well established many plants grow fast and then after many years, they slow their growth. Just to be perverse, some plants grow slowly when young and then after they are a decade old, they grow much faster. It depends on the genetic makeup of each plant as to its growth rate.  Generally, it takes 3 years of root growth in a plant to get to leap.

Patience in our culture is a revolutionary idea. Contact me if you have more questions on your landscaping.

More Blueberry Heaven: Never-Fail Varieties for Portland Landscapes

Perfect Plumpness in Blueberry cluster Portland Garden Designer

Never-Fail Blueberry Varieties for Portland Gardens

A few more thoughts on choosing blueberry plants. Last time we discussed some basics for choosing blueberries. I give you a larger selection to consider and continue to encourage the purchase of big plants.

Here’s a list of blueberries we know will do well in Northwest Oregon and Southwest Washington State—and tickle your taste buds. The listings summarize variety name, maximum height, harvest time and fall color.

Blueberry Varieties for Portland Landscapes

  • Bluecrop, 6 feet, July, red leaf and stems, tall enough for a hedge
  • Spartan, 4 feet, July, hot orange fall color
  • Patriot, 5 feet, early July, hot orange fall color
  • Olympia, 4 feet, late July, light red fall color, tolerates clay
  • Sierra, 8 feet, August, light red winter twigs, great for privacy
  • Sunshine Blue, 3 feet, August, blue-green (evergreen)
  • Bountiful Blue, 3 feet, August, blue-green (evergreen)
  • Liberty, 8 feet, August/September, red-orange, privacy screen
  • Legacy, 6 feet, August/September, hot red-orange

Now that you have information about specific varieties, here are some more hints to help you choose wisely for your garden:

  • Think—and order—ahead. For example, ‘Sierra’ and ‘Liberty’ are still hard to find and might need to be ordered. Contact your favorite nursery in January to inquire about the varieties you want, so they have time to respond or include your request in their orders. Portland Nursery, Farmington Gardens or Cornell Farms will be glad to work with you.
  • Mail order.   One Green World  If you have fallen in love with the flavor of a particular variety of blueberry, be prepared to wait 5 years for a big crop since mail order typically means a small plant.
  • Buy the biggest plants you can afford.   One-gallon plants take too long to yield a decent crop, so splurge if you can and buy bigger plants. I talked with Jim at Portland Nursery about getting big blueberry plants. They get regular shipments of 5-gallon sized plants throughout the year.
  • Blueberry and Dragonfly in Portland Residential Garden - Landscape Design In A Day.Clients wish they had bought bigger plants.  My clients, Jim and Jodi, just bought a home and I completed our second Landscape Design in a Day. Six years ago (at their old house) they bought and planted 1-gallon blueberry plants. Although their then puppy contributed to the stunted growth, by chewing on the canes and peeing on them, he shouldn’t take all the blame. They moved just before they got a great crop. This time they are going to buy big blueberry plants to start with. Remember we are buying time when we buy a bigger plant.
  • Learn basic pruning. Pruning is an important part of being happy with your blueberries (and vice versa). It’s easy, and proper pruning will increase your yield dramatically. There are many good sources for learning the tricks. However, there is no substitute for having someone show you how, putting the pruners in your hands and having you do the pruning. That’s the best way because it sticks in both your mind and muscle-memory.
  • Two Videos.  Here are two videos to help you: OSU Extension Services     University of Maine Cooperative Extension

Yes, getting those berries into your cereal bowl requires time, patience and a bit of training. But, conjure up the fragrance or flavor of a memorable blueberry encounter, and you’ll agree that the effort is worth it. After all, growing blueberries is easy compared to many other fruit plants.

Next time we will look at some of the newest varieties of blueberry. If you are ready to design your Portland garden, contact me to set up an appointment.