1.) (R) Azalea aemulans
2.) (R) Azalea bakeri
3.) (R.) Azalea alabameuse (Alabama Azalea)--moist soil
4.) (R) Azalea arborescens (Sweet Azalea)
5.) (R) Azalea atlanticum (Coast Azalea)
6.) (R) Azalea austrinum (Florida Azalea)
7.) (R) Azalea calendulaceum
8.) (R) Azalea canadense (Rhodora Azalea)--northern
9 .) (R) Azalea canescens
10.) (R) Azalea nudiflora
11.) (R) Azalea occidentale (Western Azalea)
12.) (R) Azalea prinophylla
13.) (R) Azalea prunifolium (Plumleaf Azalea)--southern low lander
14.) (R) Azalea roseum (Roseshell Azalea)
15.) (R) Azalea serrulatum (Hammocksweet Azalea)--southern low lander
16.) (R) Azalea speciosa (Oconee Azalea)
17.) (R) Azalea vaseyi (Pinkshell Azalea)
18.) (R) Azalea viscosum (Swamp Azalea)--moist soil
(R) Azalea mucronulatum (Korean Rhododendron)
My experience--Exbury hybrid Azaleas--giant flowers but brown blotched and mildewed foliage most of season
Comments--
Azalea canescens: early near white to medium pink or deep pink with darker pink tube. Heavy bloomer w/large clusters of flowers two or more buds opening at the end of the stems w/long curved extended stamens making a very attractive bouquet--thrifty medium to tall growth habit
Azalea austrina--Growth habits same or similar as A. canescens only blooming a little later. Colors ranging from cream yellow, through golden yellow to shades of orange w/deeper orange tubes.--the only native yellow species that is fragrant..
Azalea nudiflora: Upright growing shrub to about 10 feet. Flowers are light pink to a deeper violet red. Sweet scent
Azalea prinophylla--Pointed petals usually overlap but are sometimes separated with starry effect; clear pink to violet red. Upright medium height; pronounced clove scent..
Azalea alabamense--blooms two weeks after A. canescens Comparatively scare plant;first of the white to bloom.The showiest and most beautiful of all whites, usually with a yellow blotch on one petal. Upright medium height; both flower and foliage have distinctive jasmine or lemon blossom scent...
Azalea speciosa (Oconee Azalea) the earliest flowering of the reds. This is a beautiful group with flowers ranging from a striking pink, salmon, orange to some excellent reds. medium growth habit
Azalea aemulans: a low growing, heavy blooming late white of the viscosa group.
azalea bakeri: (Cumberland Azalea) an excellent low growing group usually two to four feet. Colors yellowish orange, orange to reddish orange, orange red to red.
Azalea viscosa (Swamp Azalea) upright and tall; slender tube white to cream--white blossom with a strong spicy scent
azalea prunifolia;(Plumleaf Azalea)--tall growing very late, July and august, usually reddish orange to orange red to red but also varies to orange and yellow. Beautiful
Soil acidity--100 pounds of ground limestone per 1000 square feet for each desired unit increase in ph--
heavy soils need more
agricultural (Hydrated lime) 3/4 as much
burnt lime 1/2 as much
Wood ashes 1 1/2 as much (as ground limestone)
another--50 pounds of sulfur or 100 pounds of aluminum sulfate or mixture 25 pounds of sulfur and 50 pounds of the aluminum sulfate per 1000 square feet--more for heavy soils and less for light sandy soils
Acid fertilizer: Cottonseed meal 10 pounds, Superphosphate 4 pounds, sulphate of potash 2 pounds
(1 pound to 50 square feet)
I have just used cottonseed meal at 30 pounds to 1000 square feet
Azaleas: of the obtusum subseries grow and flower well under screen, lath, or natural shade..
Indica Azalea (indicum) large mass of flowers in full sun.
indica alba (mucronatum) blooms less as shade increases--Partial, or even rather dense, high woods shade
Deciduous Azaleas--do best when they receive close to full sun for a portion of the day. Do poor in dense or low shade..
Deciduous Azalea (Roseshell Azalea) roseum grows best in an open situation
Coast Azalea (atlanticum) do best in light filtered shade
the things you see on this site --some hand written--some out of books of old--I have over 2500 old and new garden books--I have been working with plants in oneway or another for over 40 years so the bull have been left at the gate--and everything lee has come from exploring the plant world and it's trails and tribulations ---there are some goodies but it's like everything else in life--it can't be handed to you on a silver platter you'll have to find the treasures along this path with your mental labor -I hope some may help to keep your interest up
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