Category Archives: Perennials

Hardy Mums

P1010093“Mums” the word!   Our first fall shipment of the University of Minnesota Hardy Mums came in this morning.  Loaded with blossoms – you’ll find colors in purple, yellows, rust, white, orange and maroon.   Mums are heavy feeders – meaning they like to be fertilized almost everytime they’re watered to keep them blossoming as long as possible. 

Full sun is preferred, but a little light shade will work as well.  The Univeristy of Minnesota Hardy Mums are limited in availability – but when planted in the ground – should come back in the spring to accent your perennial garden again next fall. 

We’ll also be getting in some Garden Mums shortly as well, and those are treated like annuals  – they won’t survive the winter.

Tomato Soup Coneflower

P1010082P1010019Coneflowers do not just come in purple anymore!   Pictured below is a new variety that we have this year called Tomato Soup!   The color is just like tomato soup.  If you have soup in the kitchen – you need “soup” in the garden!  The stems grow to 3′ in height and the flowers will go 5″ across.  It will bloom from mid-summer to frost.  Believe it or not – there is another new echinacea called “Mac n’ Cheese”.   We’re trying to get that on our orders for 2010!

The other varieties that we are very excited about this year one of the releases in the “Big Sky” series – and new to us is Harvest Moon which is a gorgeous yellow! 

In the vibrant purple shades are Fatal Attraction and Elton Knight.   A lighter orange/yellow color can be found in the variety called ‘Mango Meadowbrites’.

Coneflowers can be done in mass plantings which are stunning.  We have a perennial bed at home with Karl Foerster Feather Reed Grass in the center, and circling that is the basic purple coneflower.  The other outstanding feature of the coneflower family is the winter interest!  We do not cut ours down in the fall but rather leave it all winter.  The birds go after the seed heads of the plants and when covered with the hoar frost of early winter, are really beautiful.

Windflower – Anemone

P1010035A late season bloomer – what could be prettier than this!  This Anemone – called ‘Robustissima’ starts blooming late summer into early fall.  Reaching a height of 30″-36″, it graces the back of the perennial bed giving you that spark of color.  Windflowers can grow from Zone 3 to Zone 8.   These perennials can be found even in the Rocky Mountains where in higher elevations the winters are colder.   Anemones prefer partial shade with well drained soil.   They can be planted in full sun, but be sure to keep them moist during the really hot periods.

Companion plants for the Anemone would be hosta, ferns, cimicifuga (bugbane), ornamental grasses, asters, sedums, and hardy mums.   These  flowers can be planted in mass which when they blossom will sway with the wind and provide a stunning feature to any perennial garden!

Shade Groundcovers

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These shade perennials grace my hosta garden.  The  photo to the right shows Pulmonaria - also known as Lungwort.  These blossom in early spring with red, pink, white and blue flowers – depending on the variety.  Some varieties have more a white colored leaf, while some are speckled or blotched,  while others are mostly green.  They look soft and have a velvety feel.

We have a bermed area with a birch tree in one of the hosta garden islands and between the tree and the outer row of hosta, we have a grouping of Lamium.   The variety we have in this location is ‘White Nancy’, and it sports white flowers during the summer.  There are a couple of varieties that have pink flowers and perhaps one of my favorites – ‘Orchid Frost’ with purple flowers.  Lamium has smaller leaves that are green with white on top, again soft looking,  and will flower.

A shade perennial with glossy green leaves that spreads out and fills in an area very nicely is Pachysandra.  Also known as Japanese Spurge, it will form a compact looking plant, will spread once established, and produces a white, bottlebrush flower in the early spring.

Perhaps the most pretty of my groundcovers (and most aggressive) is the Ranunculus – or creeping buttercup.  The lime green with a yellow cast to the leaves crawl around the area, and circles the plants.  Bright butter yellow flowers in the spring will certainly brighten up your shade garden. 

I have several other groundcovers in my hosta garden – Snow on the Mountain, Lysimachia, and Sweet Woodruff.  As the name implies, these are groundcovers – basically meaning that they will spread.  Where I want to keep a contained area, I simply pull out the runners to keep it in check.  When you pull the runners out, if done carefully, you can transplant to another area that you’d like to have a groundcover in.   I usually “thin” my groundcovers only once or twice during the summer and it keeps them where I want them!

Crazy Days Sale – July 23rd

-1Northfield’s Annual Crazy Days will be held this Thursday – July 23rd starting at 7:00 am!!  We will be having over 50 varieties of trees, shrubs and perennials on sale at 50% off!!   There will be 30% off regular prices on many other plants as well!   And, Leif will almost certainly find some things that he’ll reduce even more!   Now is the time to add a tree or two to your landscape – make a new shrub and perennial bed – whatever!   The prices will be CRAZY here on Thursday.    Stop in early to make sure you get the best selection.   We can hold your purchases while you shop Northfield and pick them up at the end of the day!

See you all bright and early on Thursday!

Delphiniums

Delphiniums – wow!  Thp1010086ese sunny area perennials will steal your heart with their gorgeous colors.  p1010089p1010088These are large plants that will reach a mature height of 5′-6′ in height.  They need to be planted in good soil so they get a good set of roots established which then enables the plant to produce this nice thick stalk which will hold up the flowers!

The pink with the blue edges is called “Blue Lace”, the bright pink is “Blushing Brides” and the pure blue one is one of the series called “Royal Aspirations”.  We have a great selection of Delphiniums, but once they start looking like this, we do sell out quickly.  Stop in check out these out!

Summertime Planting Projects

This is the time of the year when customers often ask us if it is too late to plant trees, shrubs and perennials.  The short answer is a definite – NO IT’S NOT TOO LATE TO PLANT!

Success with summer plantings is easy to achieve.  Trees, shrubs and perennials have the same needs whether it is spring, summer or fall, and following a few simple steps will ensure your success.

Proper planting technique, adequate but not excessive water, adequate but not excessive sunlight, and adequate but not excessive nutrients are all you need to provide your new landscape plants whether it is spring, summer, or fall.  It is just as easy to do in summer as at other times.

When you plant, root prune potted plants aggressively, cutting through matted roots on the outside of the root ball many times on the sides and bottom.  This will allow many new roots to quickly shoot out into the surrounding soil, providing much faster establishment and far better long term vigor.

Plant no deeper than the level the tree, shrub or perennial was growing in the pot or field, and make a circular dike of soil an inch or two high around each plant.  Place 1 to 2 inches of mulch over the dike to keep it from washing away during the first year when the plant is becoming established.

The dike will assure that the small amounts of water you provide everyday or every other day during the first 2-3 months will soak directly down into the root ball, providing adequate, but not excessive moisture.  By making this small dike around each plant, it takes only a few seconds a day to water each plant by hand.  As a result, most planting projects will require only a few minutes a day to keep adequately watered. Read More »

Shade Gardening

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We are excited about our upcoming Shade Garden seminar 

The Shady Gardener Seminar

Saturday morning – July 18th

10:30 am – 11:30 am

$10.00 per person

This seminar will feature interesting shade perennials (it’s not just hosta anymore) that every shade gardener should know about!  Come and check out our shady characters!

  • - 6 part shade perennials
  • - 6 full shade perennials
  • - 3 cool and different perennials

 We’ll discuss deer deterrents and some ideas on keeping slugs away. 

Advance registration would be appreciated.  We’ll have a coffee, cookies & lemonade.  Every seminar registrant will receive a free selected perennial for the shade!  We’ll be outside in the shade or if it’s raining, we’ll hold the seminar in our shade greenhouse.

Samantha Campanula

p6284670One of my favorite shade perennials at home blossoming right now is the Campanula ‘Samantha’.  It is tucked in between two of our Ely greenstone boulders and it is full of lavender-blue blossoms.  A compact long flowering Campanula with fragrant flowers, it blooms heavily in early summer.  It will rebloom with periodic deadheading.  I have this planted in an area that gets the morning sun.  Depending on the source, it will say it is a Zone 4 or a Zone 5.  I have had this plant here for many years so it has proven hardy here in Zone 4.

Other perennials that you can see here is Minuteman Hosta in the background, and in the foreground is a Tiarella.

Yarrow

p10100471Heidi Brosseau, our retail manager, made a display this afternoon of all of the different Yarrow that we have in bloom right now.   Achillea  – Yarrow – is a very hardy perennial.  We have seen wild Yarrow growing up in the Boundary Waters during the summer on our camping trips.  A low maintenance perennial, it is deer resistant and drought tolerant.  At maturity, Yarrow will reach a height of 20″ to 24″ and 18″ wide.  It will attract butterflies and is wonderful in bouquets and dried flower arrangements.  We have Yarrow in yellow, pink, orange and red.

Golden Carousel Barberry

p10100481A shrub for part-shade that virtually glows is the Golden Carousel Barberry.  We have several in an arc under our Autumn Spire Maple, with Blue Chip Junipers in front of those.  In the very background of this photo, between the barberry, you will see one of our large blue hosta.  The hosta gets mostly shade in this location and pulls out the same color blue as the blue chips which capture most of the sunlight in this garden. 

The Golden Carousel Barberry needs at least half-day shade.  It is a hybrid of the Korean and Japanese Golden Barberry.  It’s upright growth habit with bright golden-yellow foliage brightens any corner of your garden.  It will reach a mature height of 4′ with a width of 3′.  Just let it grow natural like we do – or you can keep them pruned into a rounded shape as well.  As with any barberry, it does have the thorns.

Diana Remembered Hosta

flower-diana1p10100501Another hosta variety that is a favorite is ‘Diana Remembered’.  This is a medium sized hosta that has a  white creamed colored edge with a vibrant blue-green on the inside of the leaf.  The leaf is slightly corrugated.  Named after Princess Diana, it has a large white flower that is one of the most fragrant hostas that you’ll come across.

This hosta variety will make a wonderful specimen plant, or you can make a backdrop using them with smaller hosta specimens in front.  We’ll soon see the flower stalks emerging and the goregous white flower soon after.

Creeping Thyme

p1010051Do you have stepping stones that weeds somehow find their way to between the stones?  I have a large diameter perennial and annual bed at home with annuals around the outside 2-3 feet and then perennials on the inside of the bed.  Instead of stepping between the annuals to do maintenance on the perennials, I installed a flagstone path on the backside of the bed for a walkway so I can access the middle of the bed.  This spring with the cool weather – it seemed that every weed in Rice County wanted to grow between my paving stones.  Yesterday, I planted several creeping thyme plants amongst and around the edges of the stones.  It already looks great.  In another few weeks, I’ll post another picture after it has taken hold and starting filling in. 

Creeping thyme is one of those perennials that really gets crabby when it’s confined to a pot.  It doesn’t like living in a small container at all.  It was amazing that simply overnight – it changed it’s appearance significantly and I am very anxious to see what happens the next few weeks.  It is blossoming right now and when it’s not full of tiny little flowers, it is just a nice green “mat” filling in the spaces between the stones.

Praying Hands Hosta

p1010048The Praying Hands Hosta has to be one of the most intriguing varieties out in the marketplace.  The upright narrow leaves of this plant gives it an unuual look like no other!  Each green leaf is rolled and folded into a tube shape, displaying the prominent vens on the back of the leaf  A thin white margin borders the outside edge of the leaf.  Certainly a collector’s hosta – for the person who wants something different!  

Jerry Williams – the person who discovered Praying Hands – lives here in Northfield and is a frequent customer here at the nursery.  It’s always exciting talking hosta with our customers!

Rhubarb Season

p1010045Gary Powell, the wonderful addition to our retail staff this year, has shared his Rhubarb Dessert recipe with us – in addition to making it for the crew the past two Sundays.  It is rhubarb season and you can never have too many recipes, right?  My rhubarb patch here at the nursery is plentiful again this year and I have encouraged the employees to take and use what they can.   

In the photo you will see Gary standing on an area of dead grass – this is my soon-to-be blueberry area.  We will be amending with lots of soil mix and peat, and planting blueberries.  We’ll have a few berries this year – but wait until next year!

Here’s Gary’s recipe – Enjoy!

 Crust:   1 cup butter, 2 cups flour and 1/2 cup brown sugar.   Mix all together as you would for a pie crust, pat out evenly into a 9 x 13 greased pan, bringing it up the sides 3/4 of an inch.  Bake at 350 degrees for 10 minutes.

Filling:  6 egg yolks – well beaten, 1 cup cream, 2 cups white sugar, 1/2 tsp. salt, 1 tsp. vanilla, 2 tblsp. cornstarch, 5 cups of finely chopped rhubarb.  Mis this together and pour over the hot, baked crust.  Then bake 45 minutes at 350 degrees or until set in the middle.  Cover with merinque.

Merinque:  6 egg whites – well beaten, 12 tblsp. of sugar, 1/4 tsp. salt, 1 tsp vanilla.   Beat together well until stiff.  Spread over filling and sprinkle with coconut or chipped almonds (optional).  Bake 325 degrees until nicely browned.