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Grass Plants, Fountain Grass
Description
(Pennisetum x advena 'Rubrum') Your order includes 5 plants. The burgundy foliage and showy blooms of Rubrum fountain grass make it a top choice for adding height and color to the landscape garden. Makes a great focal point in containers. It grows in tall, tidy clusters, and the long bottle-brush plumes dance gracefully atop 3-foot stems. Rubrum does not reseed, and it is not invasive. It is moderately drought tolerant, deer and black walnut resistant, and easy to grow. Perennial in USDA zones 9 and above; grown as an annual elsewhere. It adds flair to cut flower arrangements, too!
- Perennial in USDA zones 9-11
- 90-120 days from transplant to maturity
- 6-8 hours of full to partial sun
- Planting depth: cover root ball to same level as soil
- Plant spacing: 18-36 inches
- Ideal temperature: 70°F to 85°F
- Frost hardy? No. Grow as annual in colder zones
Growing Tips, Tricks and FAQs
Growing Tips
Fountain grass thrives in well-draining soil and full sun but tolerates light shade. Consistent watering during establishment is key, followed by moderate drought tolerance. Its rich burgundy foliage and feathery plumes add dynamic texture to borders, containers, and mass plantings.
When to Grow
Plant Fountain grass after the danger of frost has passed and soil temperatures are consistently above 60°F. In cooler climates, start indoors or treat as an annual. If you’re not sure how to find your first and last frost dates, consult our blog post 'Our Experts Answer Questions, Share Resources.'
How to Sow and Plant
Dig a hole twice as wide as the container and just as deep. Gently tease roots if pot-bound, and place the plant so the crown sits at soil level. Backfill with compost-enriched soil and water thoroughly.
How to Grow
Water regularly during the first few weeks to establish roots, then reduce to once a week or during dry spells. Apply a slow-release, balanced fertilizer in spring. Cut back to 3–6 inches in late winter or early spring to encourage fresh growth.
How to Save
By division in spring after last frost:
- Dig up the mature clump
- Separate into sections with roots attached
- Replant immediately in well-drained soil
- Water thoroughly after planting
- Keep in a warm, humid environment with bright, indirect light.
- Roots typically develop in 2-4 weeks.
FAQ
Can I grow fountain grass in containers?
Yes! Fountain grass adapts well to pots. Choose a container at least 12 inches deep and wide with good drainage. This is a great option in zones below 9 where it can be overwintered indoors.
How do I overwinter fountain grass in cold climates?
In zones below 9, treat fountain grass as an annual or dig up and overwinter indoors in a cool, bright location. Water sparingly during dormancy.
Why is my fountain grass not turning purple?
Insufficient sunlight is often the cause. Ensure your plant receives at least 6 hours of direct sun daily for the best color development. Over-fertilizing may also reduce pigmentation.
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