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Plant Care

The  table below gives basic information for caring for the perennials and woody plants that we sell.
Botanical Name Care
Acanthus spinosus Remove dead leaves in fall or spring.
Acer griseum Remove dead wood in Spring
Actaea  Allow seed heads to stay on plant for winter interest.  Cut back in spring
Actinidia  No special care
Ajuga reptans  Cut off spent flowers; may actually be mowed after blooming
Allium ‘Pink Planet’ Cut off spent flowers.  Cut back foliage in fall or spring when it dies.
Amelanchier canadensis tends to sucker - may be kept pruned to small tree - prune after blooming
Amsonia  Plants usually require no special care.  If the location is shady or the soil too rich, plants may flop after flowering.  If this happens, shear back by a third to a half and shape after flowering is complete.  Cutting back after flowering will also prevent self-seeding.  Cut to the ground in the Spring.
Anemone x hybrida 'Honorine Jobert’ No deadheading required for longer bloom time.  Cut to the ground in late fall, once they are done blooming and no longer green. Do not plant in areas that are very wet in winter.  Never transplant in the fall.
Aquilegia  Allow seed heads to remain if self seeding is desired.  Otherwise remove spent flowers.  Cut to ground in fall or early spring.
Aralia cordata ‘Sun King’ Cut to ground in late fall or spring.
Aronia  Prune out dead and damaged parts in late winter.  Can prune to shape after berries are done if desired.
Asarum canadense Cut to ground in late winter or early spring
Asimina triloba  May remove suckers to form a tree.
Astilbe  Cut off dead flowers if desired.  Cut back dead foliage in late fall or early spring.
Baptisia  After flowering you may cut back plants by one third if they flop. This maintains a neat appearance.  The disadvantage of this is that you will not get the beautiful black seed pods.  Plants may be cut back to the ground in late fall or spring.
Begonia grandis subsp. evansiana Cut to the ground in late fall or early spring.
Berberis thunbergii var. atropurpurea ‘Crimson Pygmy’ No pruning required; may prune for shape.
Betula nigra 'Fox Valley' No pruning required.
Brunnera
Cut back dead flower stems.  Remove dead foliage in late fall or early spring.
Buddleia  Cut back to 18 inches in spring just as leaves start to open. Deadhead flowers for longer bloom.
Calamintha  Cut to ground at end of season or in early spring.
Callicarpa dichotoma   Prune hard in early spring.
Calycanthus  Prune to shape after flowering.
Campanula carpatica  Remove spent flowers.  Remove dead foliage in fall or spring.
Campanula lactiflora  Remove spent flowers.  Remove dead foliage in fall or spring.
Campanula poscharskyana  Shear flowers off when done blooming.  Remove dead foliage in late fall or early spring.
Carex oshimensis  Cut out dead leaves in summer
Carex pensylvanica Cut out dead leaves in summer
Cephalotaxus harringtonia  No pruning required.  May be pruned to control size and shape.
Cercidiphyllum japonicum No pruning required
Chaenomeles x superba ‘Cameo’ Prune after flowering
Chamaecyparis obtusa 'Crippsii' No pruning required.  May be pruned to control size and shape.
Chamaecyparis pisifera 'Gold Mop' No pruning required.  May be pruned to control size and shape.
Chelone  Cut to ground in late fall or early spring.
Chionanthus virginicus  No pruning required.  May be pruned after flowering to control size and shape.
Chrysanthemum 'Sheffield Pink'
No pinching required in the spring.  This is a naturally bushy plant.  Cut back to ground in late fall or early spring.
Chrysogonum virginianum  Cut back in late fall or early spring if needed.
Clethra alnifolia  Older branches may be cut out at ground level in winter if desired.  Removing spent flowers after blooming improves appearance.
Colocasia esculenta  Dig tubers, air dry for a day  and store between 45 and 55 degrees.
Coreopsis  Shear plants in August to remove dead flowers.  Cut to ground in either fall or spring.
Cornus alternifolia No pruning required
Cornus kousa  No pruning required.  If pruning is desired, you may shape it into a bush or a tree after blooming.
Cornus mas No pruning required.  If pruning is desired, you may shape it into a bush or a tree after blooming.
Cotinus
Pruning optional; may prune hard in spring to keep small.

Crocosmia 'Lucifer' Remove dead leaves throughout summer.  Cut to ground in fall.
Cryptomeria japonica
No pruning required.
Delosperma  No special care.  Dead flowers may be removed.
Deutzia  Pruning optional after flowering; may remove old wood.
Dianthus Shear off spent flowers.
Dicentra  spectablis ‘Gold Heart’ Deadhead flowers to basal foliage. Remove any dead or unsightly leaves.  May go dormant in late summer, but if not cut to ground in late fall.
Dicentra ‘Fire Island’ Cut to ground in late fall or early spring.
Digitalis grandiflora Deadhead to lateral buds.  When all flowering is done and new basal growth starts, cut back to basal growth.  Plants may re-bloom.  Cut back dead leaves in early spring.  
Euphorbia polychroma Plants may be sheared back by one third after flowering to keep a neater plant and prevent seeding, however this sacrifices the beautiful fall color of the flowers.  Plants may be kept over winter and cut back in spring.
Ficus carica ‘Chicago Hardy’ Cut back to 3 ft and protect for winter.
Filipendula 'Red Umbrellas'   Flowers remain attractive after drying on plant.  If plant looks unattractive in late summer, cut to the ground to force new basal growth.  Cut to ground in fall or spring.
Filipendula rubra ‘Venusta’ Flowers remain attractive after drying on plant.  If plant looks unattractive in late summer, cut to the ground to force new basal growth.  Cut to ground in fall or spring.
Filipendula vulgaris Remove spent flower stems.  Cut to ground in late fall or early spring.
Fothergilla x intermedia ‘Mount Airy' No pruning required
Geranium  Dead flowers may be removed.  Cut out any dead leaves throughout the season.
Geum ‘Flames of Passion’ Spent flowers may be removed. Cut to ground in late fall or early spring.
Ginkgo biloba No pruning required
Hamamelis vernalis Remove wayward or crossing shoots
Hamamelis virginiana Little pruning required - prune after flowering if needed.
Helianthus x multiflorus ‘Sunshine Daydream’ Garden CandyTM Cut to ground in late fall or early spring.  If it flops after flowering, it may be cut to the ground then.
Heliopsis helianthoides 'Summer Sun' Deadhead and cut back old stems after blooming.
Helleborus  hybridus cut to ground in late winter before flowers appear.
Hemerocallis  Snap off seed pods and/or dead flowers as they fade.  When all of the flowers on a stem have bloomed, remove the entire stem. Start to remove dead leaves in August.  Yellow tips may be trimmed.  If it really looks bad in late summer, you may cut the entire plant to the ground.
Heptacodium miconoides Early Spring pruning is optional to shape - either a bush or a tree.
Heuchera   If foliage fades or dries out in late summer or early fall, cut off old growth.  Do not prune for winter.  Cut off any dead leaves in spring.
Heucherella  If foliage fades or dries out in late summer or early fall, cut off old growth.  Do not prune for winter.  Cut off any dead leaves in spring.
Hibiscus ‘Midnight Marvel’ Remove spent flowers and any dead leaves during growing season.  Cut down to 6 inches in fall.
Hosta  Seed heads may be removed to improve appearance.  However, the seeds do provide food for birds and may be left.  Cut foliage to ground after killing frost or in the early spring.
Hydrangea anomala subsp. petiolaris No pruning required.  If desired to control size, prune after flowering is complete.
Hydrangea arborescens    Cut to the ground in early spring.
Hydrangea involucrata Blue BunnyTM Prune in spring if desired.
Hydrangea macrophylla STAR GAZER  It typically blooms on old wood in late spring with repeat bloom on new wood from summer often into fall if spent flowers are regularly deadheaded.  Prune to remove dead wood only in spring.
Hydrangea paniculata  Pruning optional; may cut back by a third in early spring.
Hydrangea quercifolia  Pruning optional after flowering to control size.
Ilex crenata Beehive  
Ilex verticillata  No pruning required
Iris ensata  Remove flower stalks when blooming is over.  Cut back foliage in fall.
Iris sibirica  Remove flower stalks when blooming is over.  Cut back foliage in fall.
Juniperus communis 'Gold Cone' No pruning required
Kerria japonica 'Golden Guinea' Prune after flowering. Cut old canes back to strong growth or to ground level.
Kirengeshoma palmata Cut back in fall.
Lamium galeobdolon No pruning required unless plant becomes leggy.  If it does, cut it back to 5 inches.
Lamium maculatum
It is best to cut this plant back after the first bloom to promote compact growth.  Cut back dead parts in spring.
Larix laricina No pruning required.
Lavandula  Prune back after flowering.  Remove dead wood in spring.
Leptodermis oblonga No pruning needed. Shape after blooming if needed
Leucanthemum superbum   Cut to ground when flowers fade - New green foliage will return for the rest of the season.
Lewisia Little Plum Remove spent flowers.
Ligularia ‘King Kong’ Remove spent flowers.  Cut to ground in fall or early spring.
Lilium asiatic hybrid  Remove spent flowers ~ cut foliage to ground in fall
Lobelia cardinalis Remove spent flowers.  Cut to ground in late fall or early spring.
Lobelia siphilitica ‘Blue Select’ Remove spent flowers.  Cut to ground in late fall or early spring.
Lonicera caerulea  Haskaps flower on old wood, so pruning should occur after harvest. Plants should not be pruned until they have been in the ground for at least three years. Cut back the tips of stems to encourage branching as lateral branches bear more fruit. Older plants (3+ years in the ground) may be renewed by removing dead branches and weak stems in late winter. No more than 25% of the plant should be removed. For best fruit production plant more than one variety
Lycium barbarum May be trimmed and staked in spring.  Staking or trellising is recommended to allow maximum access to the fruit. Shrubs will be free standing after the first 2 years and can be pruned in early spring. 
Maackia amurensis No special care
Magnolia  No pruning required but prune after flowering if it must be done to control size.
Metasequoia glyptostroboides
No pruning required.
Microbiota decussata No pruning required.
Monarda didyma  Remove spent flowers.  Cut to ground in late fall or early spring.
Nepeta  Shear back by two thirds after blooming to retain neat appearance.  Prune hard in late fall.
Papaver  orientale  When foliage declines, around end of July, pull by hand or cut down foliage.  New leaves in late summer/fall should be left in place for winter. 
Pennisetum x advena   Hardy to Zone 9 - will not survive our winters - treat like an annual
Perovskia atriplicifolia  Prune back hard in early spring.
Persicaria polymorpha Cut back flower stalks after blooming.  Remove dead leaves in spring.
Philadelphus  Prune after blooming to shape and remove old wood.
Phlox Flame Series Deadheading will prolong bloom.  Cut to ground in late fall or when plant appears unattractive.
Phlox stolonifera  Remove spent flowers.
Physocarpus opulifolius  May be pruned after flowering.  Cut to ground in late winter if rejuvenation is needed, but bloom will be sacrificed.
Picea abies No special care
Prunus 'Kojou No Mai' No special care.   Prune after flowering if desired.
Pulmonaria Cut off dead flower stems after flowering is complete.  Cut off any foliage that becomes unattractive throughout the season.  Clean up any dead foliage in the spring.
Rosmarinus officinalis  Bring indoors for winter. Trim and use as culinary herb.
Rudbeckia
Leave seed pods on for birds.  Cut back dead stems in late fall or early spring.
Rumex sanguineus Cut to ground in late fall or early spring.  Remove flowers if desired.
Salix integra 'Hakuro-nishiki'
Prune hard in early spring; prune throughout season to retain variegation.
Salvia nemorosa  Deadheading lengthens bloom time.  If plants get leggy during the season, cut them all the way back to the newly developed foliage.  Cut plant back in fall or spring.
Sarracenia  Cut down pitchers in early spring.
Sedum  Cut off dead flower stalks.  Cut off dead parts in spring.
Sempervivum  Remove any dead parts in spring and throughout the growing season.
Spirea japonica  Prune by a third in late winter and lightly after flowering.
Spirea nipponica ‘Smowmound’  Prune after flowering.
Stachys minima Remove spent flowers.   Cut to ground in late fall or spring
Stachys officinalis  Remove spent flowers.   Cut to ground in late fall or spring
Stokesia laevis   Deadheading will lengthen bloom time. Deadhead to lateral buds and then remove entire flower stalk when bloom is finished.  Cut off dead foliage in spring.
Syringa   Cut out thin and unproductive branches after flowering.
Taxodium distichum No pruning is required.
Thuja  No pruning is required
Tiarella  Remove dead flowers after blooming.  
Tsuga  No pruning needed.
Uvularia grandiflora   Cut to ground in late fall.
Veronica  groundcover May remove spent flowers.  Cut out  dead growth in late fall or early spring.
Viburnum  Little pruning required.  May be pruned after flowering if desired.
Weigela florida  Cut back shoots that flowered after blooming.
Wisteria frutescens ‘Amethyst Falls’   Blooms on new wood, so may be thinned or shaped at almost any time.

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