Summerlong Lemon Agastache (Agastache mexicana 'Balsumlem') | Long-Blooming Perennial

Summerlong Lemon Mexican Giant Hyssop

1 Gallon

$19.00

$19.00 $0.00

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Summerlong Lemon Mexican Giant Hyssop

Agastache mexicanan Summerlong Lemon

A compact, long-blooming perennial with bright lemon-yellow flower spikes and aromatic anise-scented foliage that hummingbirds love.

$19.00

$19.00 $0.00

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Bay Area–Based Nursery

We specialize in plants grown and delivered in their original pots and soil.
Because of their size and weight, our plants are not suitable for long-distance shipping and are delivered locally to ensure health and quality.

While delivery is limited to our local service area, we’re happy to support garden design and plant selection remotely.

For local plant professionals, we’re always glad to connect and explore ways to support your customers.

Agastache mexicana 'Balsumlem', commonly sold under the trade name Summerlong™ Lemon, is a compact, long-blooming perennial prized for its bright lemon-yellow flower spikes and aromatic, anise-scented foliage . This award-winning selection from the Summerlong™ series is earlier to flower and has a longer bloom season than many other agastache varieties, producing dense, upright spikes of tubular, two-lipped, bright yellow blooms from late spring through summer and often into early fall . The nectar-rich flowers are a magnet for hummingbirds, bees, butterflies, and other pollinators. The lance-shaped to narrowly ovate, deep green foliage is highly fragrant when crushed, releasing a refreshing scent reminiscent of lemon and anise, which can be used to make herbal tea . With its dense, mounded, upright habit and excellent tolerance for heat, drought, and poor soils, this low-maintenance, deer-resistant perennial is an outstanding choice for sunny borders, rock gardens, pollinator gardens, and containers.

Knowing how we measure the size?

When browsing our plants, you may notice size terms such as Gallon, Multi, or Stand. These describe how a plant is grown, containerized, or structured at the time of sale — not just its height. Understanding these terms will help you choose the right plant for your space and expectations.

🌱 Gallon Size (Container Size)

Gallon refers to the size of the nursery container the plant is currently growing in (e.g. 1 Gallon, 5 Gallon, 15 Gallon).

A larger gallon size generally means:
- A more established root system
- A sturdier plant
- Faster visual impact after planting
Example:
- 5 Gallon: Ideal for residential gardens, easy to handle, good balance of value and maturity
- 15 Gallon: More mature, provides quicker results in the landscape

Note: Gallon size does not guarantee a specific height, as growth varies by species.

🌳 Multi (Multi-Trunk / Multi-Branch Form)

Multi indicates the plant has multiple trunks or main stems growing from the base.

Commonly used for:
- Ornamental trees
- Feature plants
- Japanese maples, olives, crepe myrtles, etc.
Why choose Multi:
- Fuller, more sculptural appearance
- Strong visual presence even at younger ages
- Popular for design-focused landscapes

🌲 Stand (Single-Trunk / Standard Form)

Stand (short for Standard) refers to a single, dominant trunk with a raised or naturally formed canopy.

Commonly used for:
- Shade trees
- Street trees
- Orchard and structural plantings
Why choose Stand:
- Clean, classic tree form
- Easier clearance for walkways and lawns
- Preferred for long-term structure and uniformity

🌿 Choosing the Right Size

If you want instant impact → larger Gallon, Multi form
If you want long-term structure → Stand form
If you want flexibility and value → mid-size Gallon containers

If you’re unsure which size or form fits your project, our team is happy to help you select the best option based on your space, timeline, and design goals.

Foliage & Flowers: Lance-shaped to narrowly ovate, deep green, fragrant leaves with a lemon-anise scent; dense, upright spikes of tubular, two-lipped, bright lemon-yellow flowers, blooming from late spring through summer into early fall .
Mature Height: 16-22 inches (1.3-1.8 ft)
Mature Spread: 16-22 inches (1.3-1.8 ft)
Growth Rate: Fast
Hardiness Zones: USDA 7-10
Light Requirement: Full sun (at least 6 hours of direct sunlight daily)
Core Benefits: Long bloom season (late spring to fall), bright lemon-yellow flowers, aromatic lemon-anise foliage, attracts hummingbirds and pollinators, drought and heat tolerant, deer resistant.
Best Uses: Sunny borders, rock gardens, pollinator gardens, cottage gardens, containers, herb gardens (for tea), mass plantings, cut flower gardens.

Q: How long does Summerlong™ Lemon bloom?
A: It has an exceptionally long bloom season, beginning in late spring and continuing through summer and often into early fall, providing months of bright color .

Q: How large does it get?
A: It is a compact, mounded perennial, typically reaching 16-22 inches (about 1.3-1.8 ft) in both height and spread .

Q: Is the foliage fragrant?
A: Yes, the deep green leaves release a refreshing scent reminiscent of lemon and anise (licorice)when crushed . The leaves can be used fresh or dried to make a flavorful herbal tea.

Q: Does it attract hummingbirds and pollinators?
A: Yes, the nectar-rich, bright yellow tubular flowers are highly attractive to hummingbirds, bees, butterflies, and other beneficial pollinators .

Q: How much sun does it need for the best flowering?
A: For the most abundant flower display and compact growth, plant in full sun (at least 6 hours of direct sunlight daily) .

Q: How much water does it need?
A: Once established, it is highly drought and heat tolerant. Water regularly during its first year. After that, it requires little to no supplemental water. It performs best with good drainage and should not be overwatered .