Eucalyptus seeds from around the world.
2389 Baby Blue Floral Variety Eucalyptus pulverulenta
ssp
This variety bred especially for professional cutflower
production. Grows 15-25 feet tall and hardy for zones 7 and
higher.
D7945 Citrodora Eucalyptus ( Eucalyptus citrodora
)
An easy to grow pot plant that will grow just about anywhere.
Has familiar Eucalyptus silvery green leaves and fresh lemony
scent.
Eucalyptus citriodora, or Lemon Scented Gum, is a stately evergreen tree native to Queensland, Australia. Leaves have a strong lemony scent when crushed. Leaves yield lemon-scented oil, Citonellal used in perfumery. The trunks and branches of this species are powdery white to pinkish and the trunks are usually very straight. In nature the trees will reach from 75-100 ft (20-30 m) tall. They are a very popular tree in California and Arizona. While this species get very big in nature, its size is easily control with selective pruning and container size when grown in the greenhouse setting. The trees are hardy in USDA zones 9-11.
Trees bloom in winter in nature, in the greenhouse they bloom in late winter to early spring. The white blooms are not very distinctive. The blooms are followed by woody urn-shaped capsules about 3/8 of an inch (5 mm) wide.
Eucalyptus citriodora need full sun with a well-drained soil mix for container growing. Most gum trees grow in very nutrient poor soils and fertilizer is not needed; however container plants should be feed once during the spring. To control the size of the trees in containers, do all pruning and repotting in late to early spring after flowering. During the winter months, the temperatures are never allowed to drop below 50°F (10°C) at night. In the landscape, trees are very susceptible to frost.
2298 Blue Gum Eucalyptus gunnii
The Blue Gum forms a striking specimen with branches of rounded
leaves in clearest blue. Making a handsome tree or bush,
Eucalyptus gunnii is the ideal plant to add style and flair to
your garden with its shimmering charm. Eucalyptus gunnii is
hardy in cooler regions once the plants are established.
However, it is best to provide a warm, sheltered position and
give winter protection over the first 2-3 years. Height 10-25m
(32-80ft) Zones 8-10.
FB150 Rose Gum Eucalyptus Grandis
Rose gum is a tall tree with smooth bark, rough at the base fibrous or flaky, grey to grey-brown. At maturity, it is often 100 feet tall, though the largest specimens can exceed 150 feet tall.
Leaves are stalked, lanceolate to broad lanceolate, glossy dark green. White flowers appear in mid autumn to late winter . E. grandis is found on coastal areas and sub-coastal ranges from Newcastle in New South Wales northwards to west of Daintree in Queensland, mainly on flat land and lower slopes.
The bark is thin and deciduous, shedding in strips to expose a smooth surface marked with flowing patterns of silvery white, slaty gray, terra cotta, or light green. Occasionally a "stocking" of light-gray, platelike or fissured bark persists over the basal I to 2 m (3 to 6 ft) on the trunk.
Rose gum is one of the most important commercial eucalypts, with more than one-half million hectares (1.3 million acres) planted in tropical and subtropical areas on four continents. Massive planting programs have been carried out in the Republic of South Africa and Brazil, and there are substantial plantings in Angola, Argentina, India, Uruguay, Zaire, Zambia, and Zimbabwe. In southwest Florida rose gum may be an emerging commercial species for plantations. It has been successfully tested for pulpwood and fuel; and its wood has potential for poles, pallets, veneer, and other products. In California, Hawaii, and Puerto Rico, rose gum appears in some species trials and landscaping. Cold hardy to about 32 degrees.
FB151 Snow Gum Eucalyptus alba
Grows to 30-50 feet tall with a spreading canopy.
The attraction is the bark which is powdery white but salmon pink when the old bark is shed. It has ovate leaves and creamy white flowers appearing in May to September
This is a useful, ornamental tree in Australia and warmer parts of the USA. Hardy to zone 8.
FB152 Tasmanian Blue Gum Eucalyptus Globulus
The Tasmanian Blue Gum, Southern Blue Gum or Blue Gum, (Eucalyptus globulus) is an evergreen tree, one of the most widely cultivated trees native to Australia. They typically grow from 30 to 55 m (98 to 180 ft) tall.
The bark shreds often, peeling in large strips. The broad juvenile leaves are borne in opposite pairs on square stems. They are about 6 to 15 cm long and covered with a blue-grey, waxy bloom, which is the origin of the common name "blue gum". The mature leaves are narrow, sickle-shaped and dark shining green.
Blue gum is one of the most extensively planted eucalypts. Its rapid growth and adaptability to a range of conditions is responsible for its popularity.
The leaves are steam distilled to extract eucalyptus oil. E.globulus is the primary source of global eucalyptus oil production, with China being the largest commercial producer. The oil has therapeutic, perfumery, flavoring, antimicrobial and biopesticide properties.
Zones 8-10.
Eucalyptus Seed Germination Instructions ( Note: Please print these instructions for future use, seed packets do not include detailed germination instructions as size of packet label is limited ).
Seed germination of Eucalyptus generally falls within two categories: Those that need no pre-treatment and those that need chilling or cold stratification. Only those species that come from colder areas need the cold stratification process. Seed sourced from warmer climate areas do not need to be pre-chilled.
About 95% of Eucalyptus seed needs no
pre-treatment. Species of the "snow gum" and a few other
species found in colder areas provide a better germination rate
when they have been cold stratified. Those Eucalyptus species
we have found to respond to cold stratification are:
Amygdalina, coccifera, dalrympleana, debeuzevillei,
delegatensis, dives, elata, fastigata, glaucescens, goniocalyx,
kybeanensis, mitchellana, niphophila, nitens, pauciflora,
perriniana, regnans, stellulata.
Cold stratification of seed is a simple process. Using a filler like perlite, vermiculite or sand, take 2-3 times the volume of filler per volume of seed. If you are stratifying 1 teaspoon of seed, use 2-3 teaspoons of filler. Mix together and slightly dampen and place in the zip lock bag the seeds arrived in and date. Place this in the refrigerated section of your refrigerator - not your freezer! Generally 4-6 weeks of chilling is sufficient, although we have not shown any detriment to the seed by leaving it in for longer periods.
After the stratification process is
complete you can sow the seed at your convenience.
Don't try to separate the seed from the inert material, sow all
together.
Instructions for seed sowing: Eucalyptus seed is generally sold with chaff (inert material). Sow both seed and chaff on the surface of a pre-moistened media. Use a high quality seed starting mix that is not clumpy or full of bark, a premium seed starting mix is well worth the investment. Some prefer to create their own special perlite/sand mix, this does very well also.
Note, it is rumored that soaking seeds in Hydrogen Peroxcide will increase germination, we do not do this, but it seems to be a common practice with many growers.
Sow the seed (and chaff if so mixed) on
the surface of my pre-moistened perlite/sand mix. Cover the
seed no more than 1/16" with sand and then cover with
plastic.
Ideal germination conditions are around 68-72 degrees F with a
humidity of near 100%, but you will still get good results at
lower humidity levels. Average germination time is about 2
weeks, although some species will germinate faster and others
at a much slower rate, some taking 6-12 weeks.
Once germination has taken place, ideally, you should remove the container of seedlings and place it an an area of bright light and provide a lower temperature of 55-60 degrees F for several weeks. The lower temperature provides a stockier seedling. Higher temperatures tend to make seedlings stretch and they become weak and spindly.
Ideally, pick out the seedlings at the "true-leaf" stage for transplant. The "true-leaf" stage is not the same as the cotyledon leaves. When a seed germinates, generally 2 leaves will show - these are the cotyledon leaves. Additional growing time is needed for the "true-leaves" to form.
Once the seedlings are at the "true-leaf" stage, carefully pick out the seedlings and transplant into individual cells. Hold the seedlings by the leaves, not the stem to prevent damage to the main stem. Carefully water the seedlings in and monitor media moisture. You don't want them soggy wet nor too dry, a slightly moist balance is what the seedlings need. Grow on in pots for the first year.
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