Native to Australia and Tasmania, the eucalyptus is commonly grown as a shrub but also can be a tree measuring 230 feet tall. Eucalyptus enhances many landscapes with its vivid yellow, white and red flowers. Consider growing your own eucalyptus to take advantage of its medicinal properties used to treat the common cold. Using a few garden supplies and household items, help your eucalyptus seeds germinate and thrive.
Perform Cold Stratification
Determine whether your eucalyptus seeds need chilling before being sown. Some species require an environment that mimics the colder weather so the seeds successfully germinate. Treat the following varieties of eucalyptus: amygdalina, coccifera, dalrympleana, debeuzevillei, delegatensis, dives, elata, fastigata, glaucescens, goniocalyx, kybeanensis, mitchellana, niphophila, nitens, pauciflora, perriniana, regnans and stellulata.
Mix 1 tsp. of seed in a bowl with two to three times the volume of filler such as sand, perlite or vermiculite. Lightly moisten the substances and place them in a container that seals.
Label your container with the name of the seeds and the current date, then place it in the refrigerator. (The freezer is too cold.)
Leave your container in your refrigerator for four to six weeks. When done, remove the container and sow the seeds with the filler using the procedure in the next section.
Sowing Eucalyptus Seeds
Place a sterilized seed-starting mix in a growing container, such as a propagator, and moisten with water. Make sure the container has a drainage hole in the bottom so the soil does not become waterlogged.
Drop the eucalyptus seeds on top of the dampened mix. Include the seed coverings (chaff) if these came with the seeds.
Cover the seeds with 1/16 inch of mix and place a covering over your container. If using a propagator, use the lid that came with the unit or else place plastic wrap over the top of your pots and poke a few holes to allow for circulation. This covering helps keep the moisture in the soil and make the temperature a little warmer.
Keep the mix temperature between 68 and 72 degrees F. If you need assistance reaching this temperature level, place a waterproof heat mat under your growing container. Germination typically happens in two weeks, but this may differ depending on the variety you are growing.