Light Needs
Mature Height
Mature Spread
Growing Zones
The Rock Steady™ Chastetree is a prolific bloomer, providing dependable flowers from spring through fall. Light purple flowers are tiny but grow in large flower spikes for a showy look. This beauty blooms on new wood and can continuously bloom for 6 to 16 weeks. Botanically known as Vitex agnus-castus 'V12-2-1', this shrub has green foliage that comes to a gentle point.
The rounded, upright form of the Rock Steady™ Chastetree works well in a mixed bed, border, or container. Trim the stems to display the cut flowers in arrangements. This is an easy plant to maintain as it is both heat and drought tolerant. The flowers attract pollinators, making this shrub a good choice for a butterfly garden. The Rock Steady™ Chastetree grows as a perennial in zones 5 through 9.
Rock Steady™ Chastetree Care
Chastetrees prefer dry, well-drained soil. An average-quality, sandy soil with a neutral pH will support growth. Plant the Rock Steady™ Chastetree in full sun. When newly planted, give the plant infrequent but deep waterings. Established plants are drought tolerant, but retain their flowers better with supplemental water during a prolonged dry period. Apply a balanced fertilizer in the spring.
The Rock Steady™ Chastetree blooms on new wood, so remove overgrowth in late winter or early spring before the plant wakes up from dormancy. Deadhead flowers as they begin to fade to prolong the bloom cycle.
Rock Steady™ Chastetree Spacing
Mature plants reach 4 to 12 feet tall and 4 to 5 feet wide. Space plants 4 to 5 feet apart to create a continuous planting.
Rock Steady™ Chastetree Plant Facts
Growing Conditions
- Hardiness ZonesGrowing Zones
- USDA Zones 5 to 9 (perennial); grown as an annual elsewhere (outdoors year-round); grown indoors elsewhere (outdoors year-round); grown in containers elsewhere (grown as a seasonal crop)
- Sun Exposure
- Full Sun (6+ Hours Direct Sun)
- Mature Height
- 4-10 Feet
- Mature Spread
- 4-5 Feet
- Growth Rate
- Fast
- Growth Habit
- , Mounded
- Water Needs
- Dry
Flowers & Foliage
- Flower Colors
- , Purple, Blue
- Flower Description
- Deep Violet Blue Spikes
- Bloom Time
- Early Summer to Early Fall
- Blooms On
-
New Wood
?
"Blooms on" tells you which stems produce flowers, which decides when it's safe to prune.
- New Wood: Flowers form on stems that grow this season. Prune in late winter or early spring without losing blooms.
- Old Wood: Flower buds form on last year's stems. Prune right after flowering. Pruning in fall or early spring removes next year's blooms.
- Both New and Old Wood: Blooms on last year's stems and again on new growth, so it flowers even after a hard winter or a mistimed pruning. Prune lightly after the first flush of blooms.
- When to Prune
- Late winter to early spring, before new growth starts
- Foliage Color
- , Green
- Foliage Description
- Pale Green
- Foliage Type
- , Deciduous
- Seasonal Interest
- , Spring Flowering, Summer Flowering
Garden Benefits
Plant Overview
- Common Name
- Rock Steady Chastetree
- Also Known As
- Chasteberry, Abraham's Balm, Lilac Chastetree,Monk's Pepper
- Botanical Name
- Vitex agnus-castus 'V12-2-1'
- Brand
- Proven Winners
- Plant Type
- Shrub
Simple Plant Spacing Calculator
Please Note: The pictures below are to give a general representation of the different container sizes. The actual size/ages of plants are estimates and will vary based on type of plant, time of year, last pruning & many other factors.
Also Known As:
Quart
Plant Age:
~ 6 months - 1 year
Plant Size:
~ 4"-8"
Pot Size:
~ 4.75"H x 4.5"W
Volume:
1.50 quarts
Also Known As:
2.5 Quart Pot
Plant Age:
~ 1 - 2 years old
Plant Size:
~ 8"-12"
Pot Size:
~ 6.5"H x 6.5"W
Volume:
2.20-2.30 quarts
Also Known As:
#1 Container
1 Gallon
Plant Age:
~ 1 - 2 years old
Plant Size:
~ 10"-14"
Pot Size:
~ 7"H x 7.75"W
Volume:
2.26-3.73 quarts
Also Known As:
#2 Container
2 Gallon
Plant Age:
~ 1.5 - 3 years old
Plant Size:
~ 12"-18"
Pot Size:
~ 9.5"H x 9.5"W
Volume:
1.19-1.76 gallons
Also Known As:
#3 Container
3 Gallon
Plant Age:
~ 2 - 4 years old
Plant Size:
~ 12"-30"
Pot Size:
~9.5"H x 11"W
Volume:
2.32-2.76 gallons
Also Known As:
#5 Container
5 Gallon
Plant Age:
~3-4 years old
Plant Size:
~ 20" - 60"
Pot Size:
~11" H x 10 1/2” W
Volume:
3.5 - 4 gallons
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We want your plants to arrive in great condition! If you notice any issues upon delivery, contact us within 3 days.
Starting January 1, 2026 all bushes, perennials & trees purchased come with an extended 1-year warranty for added confidence. If your plant dies due to a health issue within a year, we’ll make it right.
Plants that are currently in stock typically ship within 2-7 business days after your order is placed.
Plant Addicts ships to the lower 48 states within the U.S. Unfortunately, we do not currently ship to Alaska, Hawaii, or internationally.
This plant cannot be shipped to the following states: AK, HI. These restrictions apply only to this specific plant due to agricultural regulations or other limitations. Other plants may still be available for shipping to these states.
If you have any questions about shipping restrictions, feel free to reach out to our team!