Double Flowering Japanese RoseKerria japonica PlenifloraHeight: 6' average mature height Zones: 4-9 Find my zone Aspect: mostly shade to mostly sun, full sun in cooler climates Watering: needs regular irrigation, about once per week during hot weather Maximum Water: tolerates wet soils with occasional summer flooding Habit: spreads slowly to moderately by the roots Flowers In: April, May, August, September Foliage: deciduous
Size Availability
Out of season.
deep plug - 8 to 12 inches tall - $6.50 each 4 inch - $7.50 each quart - $9.99 each 1 gallon - $15.00 each
Our main crop of most plants is available starting in late fall.
Additional batches of plugs and quarts are added throughout the year.
Many of our plants are propagated in limited quantities and can sell out quickly when posted, get on the notification list below so you don't miss out. Add your email to be notified as soon as we have them back in stock:
This does NOT subscribe your email to any mailing lists, our system will only send an inventory notification message.
Production notes: reliable production
Double Japanese Rose, or
Kerria japonica
'Pleniflora' is a popular landscape specimen because of it flowers at a very young age, is fast to establish, and is deer resistant. Stems bloom very heavily in the spring before the leaves emerge, much like
Forsythia
but the 1 inch flowers are pom-pom like and more attractive than the single bloom style of
Forsythia
. Additional flowers will be produced throughout the entire growing season on the tips of new growth all the way until frost, making this one of the longest blooming shrubs available.
Plants are both very cold and heat tolerant and will grow in USDA zones 4-9. If plants freeze back to the ground in climates below zone 4 they will sprout back from the roots and still bloom that season but at a much shorter size. Kerria plants thrive in full sun in cooler climates but prefer some afternoon shade in high heat zones.
Propagating
Kerria japonica
Japanese Rose
Best propagated in winter as hardwood cuttings of new growth, or under mist using softwood cuttings in June.
Pruning and Care for
Kerria japonica
Japanese Rose
Plants are best pruned back in late spring or early summer. Flower buds for next spring develop starting in summer and persist until they bloom the following spring, so you want to prune early enough in summer that you don't reduce flowering. You can prune your plant all the way to the ground every few years, or just prune lightly to maintain a specific shape. The plants spread by the roots to form a clump.
Kerria japonica Pleniflora - Double Flowering Japanese Rose close up of the flowers
Source: Commons
Kerria japonica Pleniflora - Double Flowering Japanese Rose flowers in summer
Source: Commons
Kerria japonica Pleniflora - Double Flowering Japanese Rose
Source: Commons
Kerria japonica Pleniflora - Double Flowering Japanese Rose 1 gallon size in winter
Summer foliage and continued light flowering which persists through the growing season.
Image Credit:
CC BY-SA 3.0
Kerria japonica Pleniflora - Double Flowering Japanese Rose flowering in early spring
Source: Commons
Packing Plants For ShippingWe pack our plants depending on the needs of each species and size, most plants ship best with the roots packed in moist sawdust or bark fines but some species don't like root disturbance and are shipped in a soil-less growing media.![]() Excess soil is washed from the roots in preparation for shipping (18-24" White Pines) ![]() Plants are bundled together to fit in boxes ![]() Bundles of plants are secured in long boxes. Plant Sizes![]() 3 gallon Dawn Redwood ![]() Standard quart shrub ![]() Standard 14-18" multi-stem tree size ![]() Standard deep plug pine tree Bamboo Plants Are Shipped In Their ContainersBamboo roots are not flexible and so plants have to be shipped in their containers. These plants are heavier and are shipped separately from bare root plants. Because they are potted they can handle longer transit times so can ship via UPS Ground instead of USPS Air Mail. Potted plants can also be shipped year-round.We regularly top our 1 gallon bamboo plants at 24-30 inches tall throughout the growing season. This results in dense, bushy foliage while allowing for economical shipping. From this size most running species will grow to 5-6 feet tall in the first spring and clumping species will usually grow to 4-5 feet tall. ![]() 1 gallon bamboo plants strapped in and ready to be sealed. Unpacking Bare Root PlantsYou will be sent tracking details as soon as your plants are shipped. Unpack your plants as quickly as possible after they are delivered. We use two types of boxes, side-sealing and top-sealing. For boxes that are taped along the whole length you can cut the tape on either side and remove the plant bundles by cutting the tape holding the bundle to the bottom. For boxes that are sealed on the top and bottom, it is easiet to open the bottom of the box (the shipping label is at the top) and pull the bundle of plants out straight out. Check that the box is empty as there can be a second bundle of plants stuck towards the top.![]() A bundle of trees. What if I am not able to plant right away?You can usually leave the plants in their shipping container unopened for 1-2 days if there were no shipping delays and you have received your plants from late November through February. Plants shipped when it is warmer can't stay in their packages for as long.For longer term storage of plants you can pot them up or plant them in rows close together temporarily and then pull them out later in the spring to be planted again. This keeps the roots moist while allowing for air flow to the tops. The roots should have good contact with the soil to ensure they have access to adequate moisture. |
Size Availability
Out of season.
deep plug - 8 to 12 inches tall - $6.50 each 4 inch - $7.50 each quart - $9.99 each 1 gallon - $15.00 each
Our main crop of most plants is available starting in late fall.
Additional batches of plugs and quarts are added throughout the year.
Many of our plants are propagated in limited quantities and can sell out quickly when posted, get on the notification list below so you don't miss out. Add your email to be notified as soon as we have them back in stock:
This does NOT subscribe your email to any mailing lists, our system will only send an inventory notification message.
Production notes: reliable production
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