Citronella is known for its lemony fragrance and insect-repelling properties. Gardeners often seek this aromatic plant for its scent and benefits. Understanding its seeds is important for cultivation. This article clarifies what true citronella seeds look like, where to find them, how to grow them, and distinguishes them from other plants often mistakenly called “citronella.”
Identifying Citronella Seeds
True citronella originates from specific grass species, primarily Cymbopogon nardus and Cymbopogon winterianus. These seeds are small, slender, and elongated grains. They resemble fine rice or oat grains, easily overlooked.
Their color ranges from light tan to straw-colored or light brown. They have a smooth texture, lacking significant ridges or indentations. Their light weight and uniform, elongated shape aid wind or water dispersal. Recognizing these characteristics is essential for identifying authentic seeds.
Sources of Citronella Seeds
True citronella seeds (Cymbopogon nardus or Cymbopogon winterianus) are often found beyond conventional garden centers. They are commonly found through reputable online seed retailers or nurseries specializing in exotic herbs, tropical plants, or rare botanical specimens. Online platforms often provide clear botanical names, a key indicator of authenticity.
When purchasing, carefully check the botanical name (Cymbopogon nardus or Cymbopogon winterianus). This confirms you are getting the correct grass species. Larger garden supply stores may have limited selections compared to specialized online vendors.
Growing Citronella from Seed
Cultivating true citronella from seed involves a few specific steps to encourage successful germination. It is often beneficial to start these seeds indoors, typically 10 to 12 weeks before the last anticipated frost date. A well-draining soil mix is important for initial growth, with a common recommendation being a blend of equal parts potting soil, sphagnum moss, and sand.
For planting, the tiny seeds should be scattered lightly over the surface of the soil or covered with only a very thin layer. Some sources suggest not covering the seeds at all, as they may require light for germination. Maintaining consistent moisture in the soil is important, and providing warmth, ideally between 70-75°F (21-24°C) with the aid of a heat mat, can significantly improve germination rates. Seedlings typically emerge within 1 to 4 weeks.
Clarifying “Citronella Plant” Seeds
A common point of confusion arises with plants frequently marketed as “citronella plants,” which are often scented geraniums, such as Pelargonium citrosum or Pelargonium graveolens ‘Citrosa’. While these geraniums possess a citrus-like scent, they are botanically distinct from the true citronella grass and do not contain the same mosquito-repelling properties when simply grown in a garden. Their seeds differ significantly from those of Cymbopogon species.
Geranium seeds are generally larger and have a different shape compared to the fine, elongated grass seeds of true citronella. They are typically sown about 1/4 inch deep, indicating a more substantial seed size than those that require surface sowing. The foliage of these geraniums is also distinctly lacy or lobed, contrasting with the blade-like leaves of citronella grass. Verifying the botanical name on any seed packet or plant tag is the most reliable method to ensure you are acquiring the desired species.