Archive for Spring Gardening

Designers List of Shade Plants for Root Weevil Resistance

NE Portland Hostas with Root Weevil Damage

Root weevil damage distracts from an otherwise beautiful collection of shade loving plants.  

Designers List of Shade Plants for Root Weevil Resistance

I wanted to write a blog about shade plants for root weevil resistance. Root weevil disfigure so many shade garden plants and can make a garden look ravaged. It’s disappointing to see hosta and other plant leaves looking all chewed up. Can we design a shade garden with beauty and style without using root weevil favorite snack plants?

“Well HELL that’s not much of a shade garden” is what I said when I thought about eliminating all the plants root weevil like to eat. I was disappointed in the tiny number of plants that would work and wandered off to write about something different, something a bit cheerier!!!! However, I’ve been thinking about it and yes, we have some great plants we can use. 

Evergreen Shrubs  

Fatsia japonica Spider's Web in SE Portland Residential Landscape Design

Sometimes choosing an interesting variegated leaf, such as this Fatsia japonica ‘Spider’s Web’ can hide the notching caused by Root Weevil (look close!)

Aucuba, Daphne and Fatsia are not root weevil favorites and if you select the variegated forms the notching doesn’t show as much. To be specific, Daphne odora ‘Marginata’,  Fatsia japonica ‘Spider’s Web’, and Aucuba japonica ‘ Gold Dust’ are varieties that I recommend.

I have never seen much leaf damage on our Native Huckleberry (Vaccinium ovatum) probably because the leaves are so tiny.  

Three Root Weevil Resistant Rhododendron for Part Shade 

Grant Park Garden Design Rhododendron with Root Weevil resistance

The fuzziness on the bottom of the leaves on some Rhododendrons reduce Root Weevil damage.

I’ve found the official lists less than helpful since most Rhododendron listed are sun lovers. Root weevil prefer part shade to shade. 

Rhododendron ‘Clipiense’ is my best weevil resistant compact rhododendron for shadier situations. This rhody has fine hairs on the leaves so root weevil rarely bother it. It’s a slower growing variety and can take more shade than the other two I have listed but not deep shade.

Rhododendron ‘Fred Peste’ is a compact red rhododendron.  Fred does well in morning sun and afternoon shade, although he can take more sun than average.  

Rhododendron ‘Blue Diamond’ can take full sun but does well in full am sun and afternoon shade. It can get taller than wide.

Perennials   

NW Portland Sword Fern and Hardy Geranium in Residential Landscape Design

Sword fern (Polystichum munitum) and Hardy Geranium (Geranium macrorrhizum) do not show Root Weevil damage.

Sword fern (Polystichum munitum)  has a fuzzy frond (leaf) and root weevil don’t eat fuzzy leaves typically. Most fuzzy fronded ferns will be root weevil resistant and are an important player in a root weevil free planting. 

Hellebore argutifolius is perfect for NW Portland Landscape Designs

Helleborus argutifolius photo credit: Great Plant Picks

Hellebores are typically safe from weevil once they are mature plants. When the soft and munchable new leaves unfurl in February the root weevil have not hatched yet (here in Portland) so are not present until late April or May. The harder leafed hellebores like Helleborus argutifolius seem particularly impervious. 

Groundcover Plants   

Oregon Oxalis (Oxalis oregana) doesn’t seem to get a lot of weevil attention in my gardens and it is fun to add to salads. Same with our native piggy back plant Tolmiea menziesii. It has hairy leaves and is great for shade. For Saxifraga varieties, use the hairy leaved varieties for weevil resistance, the smoother ones are on the weevil munch list. Hardy geranium varieties that smell like cedar and have a fuzzy leaf are 100% weevil resistant – Geranium macrorrhizum for deep to moderate shade and Geranium x cantabrigiense for part sun areas. Another good bet is Sweet woodruff (Galium odoratum)

Last but not least, Euphorbia Rob’s spurge (Euphorbia amygdaloides var. robbiae) is a tough evergreen ground covering shade plant. I consider it a thug but it’s great to use in gardens where I have a path that doubles as barrier to their creeping roots. This plants roots must be contained or it will march right over your hostas. I’ve never seen any root weevil damage on this plant.

 Know Thy Enemy?   

Root Weevil have no natural predator here in the Pacific Northwest so it’s rare to find a shade garden without them.  We can cut the population of root weevil down to tolerable numbers and thus get our beautiful shade garden back. Read my blog “Attack of the Root Weevils”  to learn what can be done to reduce their population in your garden. 

 

How A Garden Helps Your Family By Helping Bees

Portland Residential Landscape Designer How A Garden Helps Your Portland Family By Helping Bees

As a parent, you work hard to help your family. That means you have to look out for their welfare. And believe it or not, that includes helping bees.

These insects do a lot for your family, but they are disappearing at an alarming rate. Thankfully, your family can support bees by creating a garden. Not only will this help them thrive, it’s fun for you and your children. But first, you need to understand why a dwindling bee population is a problem.

Bees Are Vital To Your Food Supply

The secret to why bees are so important is one word: cross-pollination. This is when pollen from one plant gets to a new plant. Pollination is what creates seeds to grow a new generation.

This is where bees come in. As they fly from flower to flower, they cross-pollinate plants. National Honey Bee Day tells us that 50%-80% of the food supply depends directly or indirectly on pollination by bees. Some of the crops that depend on bees for new seeds each year are apples, watermelons, coffee, strawberries, and even plants used by cattle as food.

That’s why this is a big problem for your family. Without bees and pollination, many foods your family enjoys will either get very expensive or disappear altogether.

Creating A Bee-Friendly Garden

Affordable Landscaping Portland

Lavandula stoeches ‘Winter Bee’

Thankfully, your family can do something to keep those foods on the table. It starts with a garden.

Bees need flowers for food. The more flowers they can find, the healthier they can become. This leads to more bees, helping their numbers get back to where they used to be. That’s why your family can help by creating a garden at home that bees will love.

Beverly Bees has several tips for helping your garden work for this.

  • You can pick flowering herbs (basil, mint, sage), flowering vegetables (broccoli, cucumbers, strawberries), or just flowers.
  • Group the same plants together in the bed to make them more attractive to bees.
  • Pick plants that bloom at different times of the season so bees have a constant food supply.
  • Late winter and early spring plants are harder for most people to plan for.  Here is Carol’s blog about flowers for winter bees.

When you visit your local garden supply store, it might help to know some terms about gardens and landscaping in general. HomeAdvisor.com has a great glossary of these terms so you know what you’re talking about.

Health Benefits Of Gardening

Garden Design Portland Designing a garden will help bees stay healthier, but your family will benefit from it as well. Organic Life explains five surprising ways gardening can help your family’s health:

  1. Reducing stress and anxiety.
  2. Decreasing risks of heart disease and diabetes.
  3. It improves happiness.
  4. It cuts the risk of Alzheimer’s by half.
  5. It improves sleep.

Gardening can also improve everyone’s self-esteem. This activity reduces cortisol in the body, which helps you feel better about yourself. In fact, just seeing your garden growing can help people feel like they did something helpful.

A Garden For Bees And Your Family

If too many bees disappear, a lot of food your family enjoys will get more expensive or even vanish. That’s why building a garden to feed bees can help. Plus, just making a garden can do wonderful things for your family. Who’s ready to get dirty? Make an appointment to start designing your Portland garden.

My Spring Veggie Garden

My Spring Veggie Garden

I’m trying some new things to improve my early spring garden this year.

Carol standing at the entrance to community garden at Rocky Pointe Marina 7 23 2014

Community garden at Rocky Pointe Marina

Early Spring Garden

Overall I’m happy with my edibles  garden experience but I miss out on the early spring garden because I don’t get my plants into the ground soon enough.  My landscape design work is seasonal and by February I’m so busy it’s too late for me to get organized for my personal garden. I’ve been vague about planting start dates.  Is it still too cold?  What is the last frost date?  This year instead of wondering about it, I’m using the Portland Nursery calendar to get out of vague and into organized.

Buying veggie starts

I called my favorite place to buy starts so I’ll know when I can purchase.  Turns out they use the same calendar and will have my starts for mustard greens, kale, collards and more by March.  My grandmother was very thrifty and every penny counted.  Her huge vegetable garden was one of the ways she contributed to her family income.  I’m playing.  The amount of greens I go through in my kitchen is significant but would not break the bank if I bought them.

Carol's winter kale

My garden supplies me with year round greens like kale.

I buy 80 percent of my plants as starts  in 4 and 6 packs.  I don’t have room in my house for setting up seeds and starts provide instant gratification and cover my soil quickly.  My neighbor Betty grows a lot of interesting plants from seed for fun.  I often benefit.  I grow spring greens from seed in my tabletop salad garden and I can start seeds for my favorite smoothie green, arugula in late February.  If it’s too cold I’m out the cost of seeds.  I sow spring greens seeds every two or three weeks until mid June.  I will purchase veggie starts for my summer garden and plant them in May and do starts again in late summer for my fall garden.

Soil Test

I’m doing a soil test this year which I’ve not done before.  My root vegetables don’t do well and I’m curious about lead.  I understand that adding certain nutrients can help lock up some of the lead in the soil.   I hope to dig out one of my beds, lay down a weed barrier and a metal grid.  Why?  One reason is to keep the ground soil which probably does have some lead in it (the garden is below Hwy 30), separate from my nice new clean soil, and the 2nd is to keep the gopher or mole from bringing that soil up into my garden and keep them from moving the soil around and messing up the roots of my plants!!  It’s a lot of physical work so I’m only going to do one bed, probably with help this year.

That’s my plan, we will see what happens!

grafted tomatoes

My husband Bob harvesting tomatoes on our floating home.

My favorite place for vegetable starts is City Farm on N. Lombard.  They grow their veggie starts in a nearby greenhouse. New Seasons often has great veggie starts.  Cornell Farms is serious about their veggie starts so you can expect a good selection.  Portland Nursery, Garden Fever, Livingstone……..lots of choices for every part of town.

Tempting Red Hellebore Flowers for Winter Cheer

Popular Double Hellebore From Englands Ashwood Ashwood Garden Hybrids

Helleborus x hybridus ‘Ashwood Double BiColor Shades’ grown here in the NW by Monrovia.

Tempting Red Hellebore Flowers for Winter Cheer

Red flowered Hellebores are still the holy grail for plant geeks but they are so tough that anyone can covet these and grow them.

‘Peppermint Ice’, ‘Amethyst Gem’ and ‘Ashwood Double Bi Color Shades’ are Hellebore cultivated varieties with red to eggplant hued double flowers.  They wow us in late winter with a long vibrant flower display.

As a Portland landscape designer I like to use Hellebore in my designs.  The Helleborus x hybridus plants (which is what we are focusing on today)  can live for a hundred years, deer don’t like them, they are low water and except for a typically minor problem with aphids, and a little slug activity they are pretty pest free.

Helleborus x hybridus 'Peppermint Ice', Perfect for Portland Gardens

Peppermint Ice has a darker outline around each of the petals. Its adds a lighter touch with pink red flowers.

They are shade tolerant although I  tend to use these three in strong morning sun with dappled or full afternoon shade.

Amythest Gem comes from the famous NW Garden Nursery. Double petals with a light edge gives us drama and the constrast needed to appreciate the mass of petals.

Double flowers give us more color than the singles but the singles, with only 5 to 7 petals, are also stunning and low maintenance.  ‘Ashwood Double BiColor Shades’ have a wine red petal with a darker edge which is opposite of ‘Amethyst Gem’.

Using Hellebore as a cut flower

The flowers last a long time in the landscape but not long as a cut flower because the stems wither quickly.  Most people cut the stems off and float them in a bowl.  I’ve picked them from my NW Portland garden, knowing they would only look good for a few days.  There are techniques for making them last which involve picking them at the right time based on the age of the flower and using an alcohol solution in the vase.  Follow this link  to NW Garden Nursery and read the bottom of their culture sheet.   Now that you are bringing the flowers inside please be aware that all parts of the plant are toxic.

All Hellebore flowers tend to nod down rather than face up.  This protects the flowers from cold damage (disfigurement/freezer burn) because water drips off the flower and  is not trapped inside. Nature designed this

Hellebore foliage looks fantastic with the lacy Himalayan Maidenhair Fern (Adiantum venustum) on this wall of boulders.

plant to flower in winter.

Great Foliage Year Round

Of course, it’s not just the flowers that encourage me to use hellebores in landscape designs. The leaves are leathery, attractive and provide interesting contrast with a range of plant material including feathery fern fronds, ornamental grasses or tiny leafed boxwood.

The summer foliage of hellebores look great with many plants including Sweet Flag (Acorus gramineus).

What about aphids?

What about aphids?  My only problem with Hellebore is aphids. Some years I don’t have any noticeable aphid activity. When I do it’s so early in the year that handy predators like lacewing and lady bug are still in sleep mode or haven’t hatched yet so I’m  on my own. Dealing with them is easy.  Use a spray bottle filled with water or 1 tsp of dish soap to 1 gallon of water and spray down your plant.  Use your hose or this great gadget called the bug blaster  which you can buy at Portland Nursery. (I’ve got to get one this year to use in my veggie garden too.) Don’t use a pesticide because most of them will harm bees even if they are not present when you spray. Aphids have soft bodies and will be damaged by the force of the water or the soapy solution will invade their bodies and disable them. You will have to knock them down with water or soapy water once or twice a week to prevent the temporary cosmetic damage.   I’ve never lost a hellebore plant to anything let alone a virus but in recent years virus has spread from plant to plant by aphids.  It is only an issue for professional growers or collectors.

Check out this bowlful of hellebore beauties

Check out this bowlful of hellebore beauties

How to care for your Hellebore

How to care for your Hellebore:  I water once or twice a week its first summer and then once a week after that.  Drip irrigation would be best rather than overhead sprinklers because drip can water deep into the soil.  Established Hellebore become quite a low water needs plant and might be content with every ten days or less.  An application of mulch around the plant once or twice a year is a good practice.  If your soil is so good that they make seedlings, be aware they won’t have the same flower as your hybridized plant. I cut the old leaves off the plant in late winter so that the flowers are not visually diminished by the previous years worn foliage.

How to kill a Hellebore

Plant it in a low spot where winter rain will rot the roots. Over water it and fertilize it heavily.

Winter Color provided by Hellebore 'Peppermint Ice'

Helleborus x Hybridus ‘Peppermint Ice’ is another Winter Gem by NW Garden Nursery. It is grown by Terra Nova so is available at local garden nurseries. Photo by Terra Nova.

Helleborus x Hybridus 'Peppermint Ice' photo by Terra Nova

Helleborus x Hybridus ‘Peppermint Ice’ has double flowers that hang down but the overall effecting your winter landscape is very colorful. The flowers last a long time.

Heuchera

Heuchera_Heucherella_Collage_1m

Plethora of Heuchera leaf color and variegation.

Heuchera_Lime_Marmalade_3m

‘Lime Marmalade’ Heuchera

Dan Himes, Portland’s own plant designer,  of  Terra Nova Nurseries took the old fashioned Coral Bell, a simple cottage garden plant that was beloved for pale spring flowers and created the dramatic colorful leaves of the modern coral bell (Heuchera).  He didn’t stop there.  Over the past 30 years he has given designers a whole new color palette to create with:  leaves of peach, orange, russet, burgundy, amethyst, chartreuse and near black.  Many of the leaves are variegated and create the most amazing patterns.  He has also created many different sizes of plants.  I can use a Heuchera in the mid border with the top of the leaves at 10 inches tall and 24 inch flowers  like ‘Lime Marmalade’ or plants a mere 5 inches tall with 10 inch flowers  like ‘Cherry Cola’.   In  recent years he has also created a diverse selection of flower colors.

'Cherry Cola' Heuchera is great at the edge of a pot.

‘Cherry Cola’  Heuchera is great at the edge of a pot.

 

The original garden coral bell bloomed in pale pink, today I can have flowers in hot brick red, coral, hot pink, near orange (no true orange yet) varying shades of yellow and even shocking chartreuse.  Some varieties are really all about the leaves and the flowers are a very quiet white or cream with stunning dramatic leaf color and variegation, but the newer varieties can have it all, bold dramatic leaves with the perfect hot flower color to accompany them.

So many choices are exciting to me but can be daunting to a typical home owner.  Twenty different varieties can stop a person in their tracks.

I’m not trying to pick a pretty plant, it would be hard to do as they are all attractive.  I always design for function and select a plant for what I want it to do.  I use ‘Blackberry Crisp’ because the leaves look good even in the winter.  They are perfect for entry pizzazz.   Some Heuchera flower for a long time in summer but have no winter interest so I use those near the patio.

'Blackberry Crisp' Heuchera

‘Blackberry Crisp’ Heuchera

There are many varieties I use for shade and some for near full sun.   I love to use the new 5 to 6 inch tall plants at the edge of containers.  These little guys look great with Spring Heather and Hens & Chicks.   Coral Bell can pull a garden together visually by repeating it along a pathway.  Their shape softens the potentially harsh lines of a modern minimalist garden plan. No matter what your style, old fashioned, naturalistic or modern  they add the dramatic color that every client wants in their landscape.

Dan’s contribution is significant.  There are many plant designers in the world and many of them worship at Dan’s feet.  I was in the Netherlands visiting a famous garden designer and plant designer named Piet O’Doff who designed the 9/11 memorial garden.  After he learned I came from Portland, Oregon he said to me, “why did you come all this way to see me when you live 15 minutes from Dan Himes”?

Heuchera softens the edges of pots beautifully.

Heuchera softens the edges of pots beautifully.

From a designers point of view Dan’s work is very exciting.  His plants give me so many choices  to create the perfect planting plan for my clients.

True confession:  to keep up with Dan Himes, I created a spreadsheet on my  favorite coral bells so I can select them for size, foliage color, flower color,  foliage height, sun exposure and more.  It’s not that easy for me either.