Trees - Misc The goal of this list is species that can be trimmed to look like scale trees. Many of these need trimming to be started early on. As usual, controlling the size of the root ball can control the size and growth rate of the "tree" Acer palmatumMaples Acer palmatum cultivarGreen Japanese maple Acer palmatum dissectum cultivarJapanese laceleaf maple Baccharis pilularisCoyote Bush Boxwoods Buxus microphylla 'Kingsville' (compacta)Japanese Boxwood Little dark green 1/4" leaves. Very tight ball. Needs some shade in summer. Sometimes flushes twice a season (what's that mean?). Partial shade. Height x spread in 10 years 6" x 6" Zone 5. Buxus microphylla 'Morris Midget'Japanese Boxwood A miniature form of Japanese Boxwood. Makes a round ball of .. Can use some shade in summer. Grows about an inch a year. Partial Shade Buxus microphylla 'Hohman's'Japanese Boxwood Camellia sasanqua "Jewel Box" has the smallest leaves Cotoneasters Like a small apple tree Cotoneaster apiculatus - 'Tom Thumb'Cranberrry Cotoneaster Looks like a small apple tree!Zones: 4-10. Tiny mounding shrub. Little white flowers in spring followed by bright red berries and brilliant fall color. About 4 inches x 10 inches at 10 years. Deciduous Cotoneaster congestus 'Nanus'Dwarf cotoneaster - Cytisus x spachianusSweet Broom Euonymus japonica microphylla variegataDwarf Boxleaf Leptospermum scoparium "Aurora nana"Dwarf Australian Tea Tree Leptospermum scoparium "Kiwi"Rosea Tea Tree MyrtusMyrtles Myrtus communis compactaDwarf Sweet Myrtle Myrtus communis microphyllaDwarf Sweet Myrtle Pittosporum tenuifoliumkōhūhū / black matipo, small evergreen tree Podocarpus nivalus 'pink tip' Found only in New Zealand Punica GranatumPomegranates Punica Granatum 'Nana'Dwarf / Miniature Pomegranate takes a lot of trimming and control, but look great Punica Granatum 'Emperor Nana'Dwarf / Miniature Pomegranate Rhododendron radicansDwarf rhododendron Rosmarinus officinalisRosemaries can look like desert tree or chaparral - has flowers (what time of year?) Rosemary is a long-lived, semi-woody, tender perennial herb that can become a bonsai in a single year with a minimum of effort. Rosemary can reach a maximum height of 48" if field grown in only three years and live as a bonsai for over 30 years. Since the Rosemary's leaves are needle-like, the plant is most often grown in the same classic bonsai styles as the pine. Rosemary has been long cultivated as an herb and ornamental. The herb now is available in an astounding number of cultivars (24!) with an abundance of flower colors (Blue, Violet, Pink, White), scents (Pine, lemon), and growth habits (upright, twisting, creeping). There's even a variegated cultivar. With some cultivar hardy to zone 7, Rosemary can be grown out-of-doors all year round. In colder climes, the herb can successfully be overwintered indoors under lights. Lighting and Temperature Full Sun in all zones, a minimum of 6 hours of direct sunlight per day during spring/summer/autumn. When overwintering indoors, give it 14 hours under full-spectrum lamps or a sunny spot with direct morning sun. Rosemary is a tender perennial in zones 11-7 and an annual in zones 6-3. For a bonsai, bring indoors before first frost date. A single light frost is unlikely to kill any cultivar of rosemary. A properly hardened off Rosemary (of the hardier cultivar) can withstand brief 20F temperatures if field planted. During indoor wintering, give it cool days (~70F) and cooler nights (65-60F)with lots of morning sun, no afternoon sun, and lots of air circulation. Water and Fertilizer Rosemary does not like wet feet. It can survive dry soil for a day or two. Best to let the soil dry out almost completely then water. Use a chopstick to determine soil moisture. When the chopstick is pulled out and feels totally dry (cannot smear mud on dry paper), then water. Only water in the morning to prevent the roots from sitting in water overnight. Humidity should be maintained at over 50% (relative) with the use of a humidifier or humidity tray. Use 20:20:20 non-acidic liquid fertilizer every other week as long as day temperatures are above 50F. While wintering indoors, reduce feeding to once monthly. Watch for nitrogen deficiency, especially with the organic mix given below. Time released Oscomote (36:18:12) also has proven to work well. There is no need to dilute fertilizer past the manufacturers recommendation. Repotting Repot every other year in very well drained mix of 50% organics such as screened fir or pine bark and 50% inorganics (pumice, perlite, haydite, etc). Add limestone or dolomite to the soil mix to buffer the pH of the soil mix. Do not use peat moss. Try to limit any root pruning to the early spring, before the new growth gets too advanced. Never root prune by more than 1/3 during any year. Styling Rosemary comes in both upright and prostrate varieties. Rosmarinus officinalis forms itself into a striking formal upright with minimum effort. The prostrate varieties can be formed into everything from informal upright cascade to windswept. The only style that the species does not lend itself to is root over rock. Clip and grow is the best styling method since the wood, once hardened, is impossible to bend without splintering. You can pinch new growth after the first sets of leaves completely open. Start midsummer by cutting back top foliage to old wood to encourage some of the lower and finer branches to expand and thicken. Propagation, Pest and Diseases Usually grown from softwood and semi-hardwood cuttings in summer using low IBA rooting hormone. Rootone TM, or Hormex #1 or #3 TM or Dip and Grow TM at 20:1 dilution are sufficient. Cuttings are placed in sterile media and root in 2-4 weeks. Rosemary is subject to root rot in poorly draining soils or when grown in inadequate light. Cultivars Suitable for Bonsai Rosemary, Arp, (Rosmarinus officinalis) Zones: 7-10 (very hardy H1)Flowers: pale blue, summerGrowth Habit: uprightOther: green-gray foliageUses: ornamental and culinary, popular bonsai subject Rosemary, Benenden Blue (Rosmarinus officinalis 'Benenden Blue') Zones: 8-10Flowers: blue, midsummerGrowth Habit: uprightOther: dark green foliage, bred for deep blue flowersUses: ornamental and culinary Rosemary, Blue Lady (Rosmarinus officinalis 'Blue Lady') Zones: 8-10Flowers: blue-violet, summerGrowth Habit: twistedOther: very narrow leaves, very needle-like. (Popular Bonsai subject)Uses: ornamental and culinary Rosemary, Blue Spires (Rosmarinus officinalis 'Blue Spires') Zones: 8-10Flowers: Bright blue flowers on tall upright stemsGrowth Habit: creeperOther: specially developed for visual and olfactory appeal.Uses: *very* ornamental and yet still culinary Rosemary, Collingwood Ingram (Rosmarinus officinalis 'Collingwood Ingram') Zones: 8-10Flowers: blue, summerGrowth Habit: creeperOther: highly fragrant, bright green foliageUses: ornamental and culinary Rosemary, Foresteri (Rosmarinus officinalis 'Foresteri') Zones: 8-10Flowers: blue, summerGrowth Habit: uprightOther: especially drought resistantUses: ornamental and culinary Rosemary, Girardus (Rosmarinus officinalis 'Girardus') Zones: 8-10Flowers: blue, summerGrowth Habit: uprightOther: very, very dense foliageUses: culinary (Very rare in U.S. of A.) Rosemary, Golden Rain (Rosmarinus officinalis 'Joyce de Baggio') Zones: 8-10Flowers: blue, summerGrowth Habit: uprightOther: variegated (yellow on foliage edges) increasing variegation with age.Uses: ornamental and culinary Rosemary, Gorizia (Rosmarinus officinalis 'Gorizia') Zones: 8-10Flowers: blue, summerGrowth Habit: upright (larger then most)Other: densely packed branches of dark green needles, fragrantUses: ornamental and culinary Rosemary, Hill Hardy (Rosmarinus officinalis 'Hill Hardy') Zones: 7-10 (very hardy Gloxinia)Flowers: blue, summerGrowth Habit: uprightOther: needlelike foliage, fragrantUses: ornamental and culinary Rosemary, Kenneth's Prostrate (Rosmarinus officinalis 'Kenneth's Prostrate') Zones: 8-10Flowers: blue, late summer and early fallGrowth Habit: creeperOther: fast growerUses: ornamental and culinary Rosemary, Lockwood de Forest (Rosmarinus officinalis var. angustifolius 'Lockwood de Forest') Zones: 8-10Flowers: lavender blue, summerGrowth Habit: creeperOther: dark green foliageUses: ornamental and culinary Rosemary, Logee's Blue (Rosmarinus officinalis 'Logee's Blue') Zones: 8-10Flowers: Blue, summerGrowth Habit: uprightOther: bluish green foliage, smaller Ogee's.Uses: ornamental and culinary Rosemary, Miss Jessup (Rosmarinus officinalis 'Miss Jessup') Zones: 8-10Flowers: BlueGrowth Habit: uprightOther: bred especially for floweringUses: ornamental and culinary Rosemary, Mrs. Howard's Creeping (Rosmarinus officinalis'Mrs. Howard's Creeping') Zones: 8-10Flowers: small blue, mid to late summerGrowth Habit: creeperOther: fast growerUses: ornamental and culinary Rosemary, Pine-Scented (Rosmarinus officinalis 'Pine-Scented') Zones: 8-10Flowers: Blue, summerGrowth Habit: upright, feathery needle-leavesOther: grown as miniature Christmas Tree, leaves have pine fragrance.Uses: ornamental and culinary Rosemary, Rex (Rosmarinus officinalis 'Rex') Zones: 8-10Flowers: Blue, summerGrowth Habit: uprightOther: dark green foliageUses: ornamental and culinary Rosemary, Santa Barbara (Rosmarinus officinalis 'Santa Barbara') Zones: 8-10Flowers: Blue, summerGrowth Habit: uprightOther: drought resistantUses: ornamental and culinary Rosemary, Severn Sea (Rosmarinus officinalis 'Severn Sea') Zones: 8-10Flowers: Violet-blueGrowth Habit: uprightOther: ornamental and culinary Rosemary, Spanish (Rosmarinus officinalis 'Majorca') Zones: 8-10Flowers: Pink, throughout summer.Growth Habit: uprightOther: very needlelike leaves (popular bonsai subject)Uses: ornamental and culinary Rosemary, Tuscan Blue (Rosmarinus officinalis 'Tuscan Blue') Zones: 8-10Flowers: Blue, mid spring to late summerGrowth Habit: uprightOther: extremely fragrant, bred especially for dense flowering.Uses: ornamental and culinary Rosemary, White-Flowered (Rosmarinus officinalis 'White-Flowered') Zones: 8-10Flowers: WhiteGrowth Habit: uprightOther: extremely fragrantUses: ornamental and culinary Serissa japonica / Serissa crassiramea (ex Serissa foetida)Snow Rose also "Pink Princess" variety, can "Cherry Blossom" variety Serissa Foetida also known as White Swan? Foetida likes partial sun, crassiramea likes full sun. The growth is sensitive to light, too little will not give you the nice compact growth, changes in light upsets the Snow Rose.Likes slightly acid soil, tolerates USDA zone 9. The snow rose or tree of a thousand stars (Serissa foetida (L.f.) Poiret ex Lamarck) is a unique member of the Rubiaceae, the madder family. Native to open woodlands of Southeast Asia, China, Taiwan, and southern Japan, the snow rose is a small evergreen shrub with tiny opposite leaves and petite funnelform flowers. Like its cousin, the coffee, the plant bears berries with 2 seeds. The only species in its genus, snow rose is variable with single or double, white or pale pink flowers and plain green or variegated foliage. The photographed plant has double flowers with deep green leaves; each tiny 'rose' is less than a quarter of an inch in diameter. Snow rose is a popular subject for bonsai particularly in Japan. But it is not an easy plant to cultivate. Too much water, too windy, too cool, or too little humidity and the plant drops its leaves. If conditions remain poor for any length of time, entire branches die off. But it makes a wonderful bonsai and challenge. The bark splits and looks old and rugged even in relatively young plants. The tiny leaves lend themselves to the overall impression of an ancient tree. The flowers appear in the axils of the leaves from early spring through late autumn. But best of all, when in full bloom during summer, it fulfills the name 'tree of a thousand stars'. Thuja orientalis 'Aurea Nana'Dwarf golden arborvitae UlmusElms Ulmus neriCork Bark Elm The Neri Elm has small serrated green leaves with good fall color. It has a striking gnarled corky bark appearance hence the name Cork Bark Elm. Deciduous. Ulmus parvifolia 'hokkaido'Hokkaido Elm Native to Japan and Korea, the Hokkaido Elm is a Chinese Elm, not troubled by the Dutch Elm disease that has destroyed so many other species. It is extremely slow growing and will grow only to about 18" tall. The Hokkaido forms a rugged trunk with a corky bark that flakes off in rounded plates. This cultivar of ulmus has the tiniest leaf of all Elms (only 3/8" long)and they are short-stalked, oval with a slightly pointed tip and toothed margins, bright green on the upper surface, lighter green underneath. Very nice fall color. Deciduous. Temperate. Protect from frost. Ulmus parvifolia 'seiju'seiju Elm Ulmus x hollandica 'Jacqueline Hillier'Jacquline Hillier Dwarf Elm - Formerly called Ulmus x elegantissima 'Jacqueline Hillier,' & still commonly sold by that name. Because of a long period of uncertainty about its parentage, it is still sometimes sold as U. minor or the synonymous U. carpinifolia. 'Jacquelline Hillier' is a beautiful dwarf elm that can be grown in the garden as a shrub or dwarf tree, or in containers, or as bonsai. Because the leaves are micro versions of a full-sized elm, it is a particularly good visual choice for bonsai, as it can truly look like a miniature of a gigantic elm.They are very winter-hardy to minus ten degrees F. or even colder, & go through all the expected seasonal changes of a temperate deciduous tree, though holding their tiny leaves until the start of winter, growing them back come April.