lemongrass plant height

How Tall Does Lemongrass Grow?

Lemongrass (Cymbopogon citratus) typically reaches a plant height of between 1 to 1.5 metres when mature. In ideal conditions, which include full sun, rich free-draining soil, and adequate moisture, lemongrass forms dense clumps with graceful, arching foliage. These clumps can reach up to 1 metre wide, offering attractive structural contrast in both edible and ornamental garden designs.

If you’re planning to grow lemongrass in northern parts of New Zealand, you can expect it to achieve its maximum potential height with little winter dieback. In cooler areas, plants may be somewhat smaller, typically around 1 metre, as growth slows in cold conditions. For gardeners aiming for year-round foliage and the full range of lemongrass characteristics, consider planting it in a sheltered, sunny spot or growing it in containers that can be moved indoors during frosts.

Companion Grasses and Design Ideas

Lemongrass plant height makes it a superb companion for other medium to tall grasses, adding both texture and scent to mixed plantings. For a blue-toned contrast, try planting lemongrass near Helictotrichon sempervirens (Blue Oatgrass). This perennial’s powdery blue foliage creates a striking colour combination and similar upright habit.

If you’d like to introduce more low-maintenance, flowering grassy accents, consider combining your lemongrass with Sisyrinchium 'Devon Skies' or Sisyrinchium bermudiana (Moraea bermudiana). These iris relatives offer delicate blooms and thrive in the same well-drained, sunny positions as lemongrass.

For larger-scale plantings or screens, Chondropetalum tectorum (Thatching Reed) is another fantastic choice. Its bold, vertical growth pairs beautifully with the arching form of mature lemongrass, creating dynamic layers in contemporary or naturalistic gardens. For year-round white flowering accents, Liriope 'Monroe White' offers a tidy, low-growing companion that won’t overshadow your lemongrass plants.

Tips for Encouraging Tall, Healthy Lemongrass

To achieve optimum lemongrass plant height, plant Cymbopogon citratus in full sun and enrich the soil with compost or well-rotted manure. Regular moisture during the growing season encourages rapid, leafy growth. If your region experiences harsh frosts, mulch heavily or dig clumps up for overwintering indoors.

Because lemongrass can reach impressive heights, allow ample space for mature plants. Use the lush clumps as edible screens, background planting, or as part of a sensory garden where the citrus scent can be enjoyed.

Ready to enhance your garden with dramatic foliage and fragrant air? Pair lemongrass with architectural grasses like Helictotrichon sempervirens (Blue Oatgrass) or flowering accents such as Sisyrinchium 'Devon Skies' for a landscape that’s as beautiful as it is useful.