Rhododendron Bloom in Full Shade?
mistascott
13 years ago
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mainegrower
13 years agolast modified: 9 years agoRelated Discussions
North garden w/ AM shade, PM sun: full sun or partial shade?
Comments (8)I think you would be fine with hydrangeas there. If salvias are too floppy, try some veronicas or agastaches. You might even be able to grow baptista (false indigo). I have a similar exposure in my zone 5 Iowa yard. Trees along one side, and then it slopes too, so it is a bit of an odd long bed. It used to be grass and mostly invasive Asian honesuckle shrubs. I have only been gardening at this house for 1 1/2 years, so I am still experimenting; plus I am new to this zone and previously lived in zone 9. I first considered this area part shade and planted accordingly. Now I see there are pockets of more and less sun. In this area the plants doing best are: Hostas--This surprised me, but I see them in full sun around town now that I have started looking. Not sure if it is the same for zone 6. Foam flower--this looks GREAT right now with tidy foliage and is still blooming. I had some red tulips behind the foam flower and they looked lovely. Columbines--flowering nicely with airy foliage. Agastache--the one I have has short white flowers, but blues are common I think. Overwintered and re-sowed abundantly. My soil drains well so may be why they like it there. Garden phlox--were small plants last year from Bluestone spring sale. SO far they are growing nicely but will see if they flop. Today the whole area seemed to be in so much sun! Daylillies--will see how they do this year Foxglove--sowed last summer, getting ready to bloom, seems to be good for them in this spot. Monarda, bloomed last summer and no flopping. Soloman's seal--in a shadier pocket, but still gets some afternoon sun. Doing really well right now. helleborus--one little helleborus which has been doing great so far this spring, to my surprise. When I realized how sunny the spot was, I thought I'd move this little plant, but it is doign well. Toad lily--these are growing nicely and had attractive late flowers last year. Lobelia--there are some nice blue lobelias available. low growing veronicas--doing very well and blooming profusely. Happy planting. :)...See MoreFragrant Rhododendron full sun/ dappled shade
Comments (12)Full shade, scented, & summer interest is a tall order. Most rhododendrons will not bloom well or at all in full shade. Scented is doable, but only when they bloom. Summer interest most likely will be foliage. Here is a rhododendron with fragrant flowers and tolerant of shade: Janet Blair – 5', -20F. 'Janet Blair' has large, fragrant, frilled lavender pink flowers fading to a pale center and topped off by a blotch of yellow rays on the upper lobes. Blooms third week of May, and is better in moderate shade than most other varieties. Photo at http://rhodyman.net/rhodynfr.php#anchorH2a One deciduous azalea has very fragrant flowers and does well in shade. R. canescens – 5', -5F, Flowers can vary in shading from white to pink. Very fragrant. May blooming. Prefer moist, humus-laden, acidic soil but seem to do equally well in shade or sun. Photo at http://rhodyman.net/rhodynsh.php#anchorASS Here are some rhododendrons that will bloom with a fair amount of shade. Bow Bells may be your best bet for 2 our of 3, shade and summer interest. Bow Bells – 3', -5F. The pink flowers are followed by shiny, copper colored new leaves. As the season progresses, the mound becomes a superb jade green with rose-red bud scales for another show of color. Fertilize lightly if at all, as an excess of fertilizer will cause foliage burn more easily than on most rhododendrons. Boule de Neige – 5’, -25F. The flowers are white, It blooms well in deep shade. Elviira – 2', -30F. It grows well in shade. Flower buds open bright red. Loderi King George – 6', 0F. Huge pale pink flower clusters that turn white as they mature. If given enough shade they are also drought tolerant. Nova Zembla – 5', -25F. Dark red flowers in a ball-shaped cluster. Shade tolerant. P.J.M. hybrid rhododendrons. Rhododendrons in the 'P.J.M.' group are smaller, growing to a height of 3 to 5 feet tall. Form is rounded and the foliage is leathery and dark green until fall when it turns almost purplish. One of the reasons rhododendrons in the 'P.J.M.' group are such heavy bloomers is that the plants do not set seed. They are among the most shade tolerant rhododendrons. They include the following: Black Satin – 3', -20F. It has dark rose-pink flowers. Fall and winter foliage is glossy and very dark purplish-black. Desmit – 1', -20F. It has vivid, showy, pink flowers. Elite – 4', -25F. It has vivid, showy, rich pink flowers. Henry's Red – 4', -25F. It has vivid, deep red flowers. Low Red Frilled 4', -25F. It has vivid red flowers. Molly Fordham – 4', -20F. It has vivid, white flowers. Olga Mezitt – 3', -25F. It has vivid, peach-pink flowersl. Regal – 5', -30F. It has vivid, light purplish-pink flowers. Victor – 4', -25F. It has vivid, light purplish-pink flowers. Weston's Pink Diamond – 5', -10F. It has frilled, double, vivid, pink flowers. Ramapo – 2', -25F. Flowers are bright violet-pink. Tolerates shade. Red River – 5', -20F. It is a red flowered maximum. It has the late bloom and the large leaves of maximum. The flowers, larger than maximum's flowers, are bright red with a white throat and small yellow dorsal flare. Tolerates shade. Snow Lady – 2.5', +5F. It produces an abundance of snowy white flowers and has fuzzy green leaves. To see photos of the flowers and more details, visit http://rhodyman.net/rhodynsh.php#anchorHR...See Morerhododendron not blooming
Comments (5)Failure to set flower buds may be a sign of too much health and vigor in a plant. One solution my be to prune the roots by cutting around the plant with a spade or moving the plant. This will check foliage growth and encourage production of flower buds. Application of nitrogen rich fertilizers are the main cause of vigor which suppresses flower bud production. Deadheading flowers as soon as they wilt can promote flower bud production. Too much shade, a cool wet summer, or inadequate phosphorus or potassium in the soil may also suppress flower bud production. There are a number of other reasons for a lack of flowers. The effect of each variable depends upon the variety of the plant. The effects include: * Pruning. The buds are formed in late summer and early fall so pruning then or later is not advisable since it will remove flower buds. New leaf buds will form in the spring, but new flower buds won't form until the next year. * Variety. Some plants will never bloom. Some rhododendrons that come from the seed of a hybrid plant will look good but will never produce flowers or will produce very poor flowers. To come true to the parent plant, a hybrid may be propagated by cuttings or tissue culture but not from seed. A good hybrid seedling only comes about once in a while. For that reason it is important to know that you are getting a good named variety or a good species. * Fertilizing. Nitrogen promotes leaf and branch growth and discourages flower bud production. It can also force late season growth that gets killed or stunted by frost damage. Phosphorus promotes flower bud production and hardiness. Potassium is necessary for well being. * Weather. Cold weather can kill flower buds. Usually you see the brown buds in the spring. Cold spells in the fall or spring can damage buds that are not hardened off. Bud blast (blooming in fall or winter) uses up good buds which are then not available at the normal blooming time. * Age. Most rhododendrons take 2 to 3 years to bloom from a rooted cutting unless forced. Some take longer and some bloom sooner. From seeds the plant may take 1 or 2 additional years. * Sun & Shade. Some rhododendrons need full sun to bloom and others can take fairly dense shade. In general, the more sun the more flower buds but also the greater exposure to damage from desiccation in summer or winter. More shade produces tall spindly foliage and less flowers. * Inspection. You can usually tell if the plant has ever bloomed. A rhododendron that has bloomed will have the seed pods on it unless it has been dead-headed. If dead-headed too late after blooming, new flower buds can be damaged. There are many other cultural variables that influence the plant's health and hence, its ability to produce flowers. Here is a link that might be useful: How to grow rhododendrons and azaleas....See MoreRhododendrons for full shade zone 5
Comments (14)its tricky.. but her name says toronto ... what has grown there previously ... a good indication of light .. defining SHADE is near impossible in words .. as noted.. it can be grotto dark.. or very bright ... when it all boils down.. no one can tell you what will work in a given spot.. in your yard ... you just have to experiment ... until you find what works ... an also as noted.. you might need to be persistent .... if you insist on a specific plant ... which might lead one to not putting all your eggs in one basket.. and trying a number of different type plants ... rather than a monoculture. ... lack of light.. will rarely kill a plant .. other than grotto dark ... but it can affect vigor ... which would translate into either it being leggy or not full .... or in the case of flowering plants.. reduced flowering .. in other words ... it might not end up being like the pix you see.. of well sited plants ... good luck ken ps: btw.. a lot of plants that favor shade .. or are tolerant of shade... it can be more of a water issue ... in other words.. they prefer a respite from direct sun .. in the heat of the day.. if they can not pump enough water regarding such ......See Morerhodyman
13 years agolast modified: 9 years agoIris GW
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mistascottOriginal Author