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Fukien tea - Carmona microphylla
or Ehretia microphylla
General Information: A very small genus of tropical tree which was once
referred to (and still often listed as) Carmona. The most widely
known Ehretia species is the Fukien tea, a tropical shrub originating
in Southern China and other parts of Southeast Asia. It is very
popular for bonsai in China, but not a traditional favorite in
Japan. It can be grown outdoors in warm climates, but is quite
popular as an indoor bonsai. Ehretia anacua, a recent addition
to bonsai, is more resistant to heat and draught.
Lighting:
Likes a bright position (1000 Lux). Most sources recommend only
about an hour of direct sunlight daily, although success has
been reported growing it in a sunny position all day.
Temperature:
Ehretia prefers temperatures between 60-72F in winter, although
occasional dips into the forties produce no ill effects. In the
summer, most books recommend protection from extreme heat, although
the plant has been successfully grown in sweltering Texas weather.
Ehretia does not like draughts.
Watering:
Keep well watered, reducing watering only slightly in winter.
Never allow Ehretia to stand in water, or allow the soil to dry
out completely. Frequent misting will discourage spider mites,
but will apparently encourage mealy bugs. Choose your poison!
Ehretia anacua, a Texas native, is more resistant to draughts,
and likes to dry out a bit between waterings, but should not
be allowed to become bone dry.
Feeding:
Every two weeks during growth, every four-six weeks in winter.
Use bonsai food or half strength plant food. Do NOT use Miracid.
Fukien tea does not like to be overfed; Lesniewicz suggests watering
well before feeding to avoid root burn. Feeding weekly has been
reported with success - I would guess that frequency of feeding
can be increased as long as the strength of the food is kept
diluted.
Pruning and wiring:
Prune new shoots after six to eight leaves have appeared. The
leaves are tiny enough that leaf pruning should not be necessary.
Can be wired any time during the growing season, but it is generally
styled through pruning alone. Wire should not be left on over
three months. Its small leaves and fine branch ramification make
it ideal for miniature bonsai.
Ehretia anacua does not ramify as well,
and its stiff branches make wiring dangerous. It has a strong
tendency towards apical growth, and needs constant pinching of
topmost branches. It buds back readily on old wood, and is suitable
for any style, although broom and literati are especially nice.
Propagation:
By seed or softwood cuttings in spring or summer. Cuttings root
more readily if given bottom heat.
Repotting:
Every 2-3 years, in early spring. Reduce water after root pruning.
Bottom heat helps stimulate new root growth. Use basic soil mix.
Ehretia anacua is a faster grower than other Ehretia species,
and may need yearly repotting in hot climates. It may be repotted
spring-fall, but should be defoliated in the heat of summer.
Beware of snapping thick roots - they are more brittle than they
appear.
Pests and diseases: Aphids, scale, chlorosis, mealy-bugs, snails.
Red spider mites find this plant a special treat, and will attack
it over any other plants in the area. Unfortunately, Fukien tea
is very sensitive to insecticides, and Diazinon will kill the
tree. Use the weakest insecticide possible that will address
a particular problem, or if possible, employ predator insects.
Will drop leaves if underwatered. Overwatering results in yellow,
sickly leaves. It is quite sensitive to sudden changes in temperature
and lighting. Ehretia anacua is more resistant to pests, with
leaf miners being the only reported problem.
Some species suitable for bonsai:
- Ehretia anacua - Rick describes this tree:
15 to 40 feet tall with a straight, fluted trunk having thick,
furrowed dark brown bark. The leaves are rounded, dark green,
and extremely rough, like sandpaper. The tree is listed as evergreen
but colder temperatures will cause them to shed their 3"
leaves. Depending on rainfall, the tree will flower, with clusters
of white blooms, from early spring through late fall. The flowers
are followed by yellow to red, two-seeded berries.
- Ehretia buxifolia (also called Carmona
microphylla, Ehretia microphylla): Fukien tea, Philippine tea
- Well loved for bonsai due to its tiny, shiny green leaves,
tiny white flowers throughout the year, and red berries.
- Ehretia dicksonii - a deciduous species
of Ehretia. Rare as bonsai.
- Ehretia thrysiflora - Another deciduous
species of Ehretia which deserves wider use in bonsai.
Bibliography:
"Bonsai Tips & Hints: The Works
About Fukien Tea", by Jean C. Smith, Florida Bonsai, VII,
2:45-47.
"Fukien Tea - A Tree Worth Knowing", by Jean C. Smith,
Florida Bonsai, XIV, 2:16 19
Ainsworth's Art of Indoor Bonsai," Jahn (ed.) "The
Simon and Schuster Guide to Bonsai," Lesniewicz's "Bonsai
in Your Home," Owen's "Bonsai Identifier," the
Samson's "Creative Art of Bonsai," and Tomlinson's
"Complete Book of Bonsai,"
a post by Matthew Ward which compiled information he found on
rec.arts.bonsai, and several posts by Rick from S-most Texas.
- Compiled by Sabrina Caine and Thomas L.
Zane
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