Light Needs
Mature Height
Mature Spread
Growing Zones
The Happy Jack Purple Clematis is a new and improved version of the popular 'Jackmanii' clematis. The flowering vine has velvety purple flowers with bright yellow stamens just like the old version, however this plant has larger and brighter colored flowers. The flowers can grow up to be 5 inches wide! These will typically grow up to 8 feet tall, however some clematis have been known to grow as tall as 20 feet!
Grow these on a trellis, over a garden arch, or on the side of a building. The beautiful vines can grow up just about anything, but be sure to provide SOMETHING to support the vines and allow them to climb upwards. These are very low maintenance once established. The plant is deciduous which means the leaves fall off in the winter. The foliage is dark green when leaves are present. This plant was also the winner of a Green Thumb award from the Direct Gardening Association.
Happy Jack Clematis Care
Prune Happy Jack Clematis in the spring, because this is a group 3 clematis. We recommend trimming back to 2 feet tall. Apply a slow/controlled release fertilizer afterwards. The plant can grow in partial sun to full sun. It is best to have the base in partial sunlight to protect the base, and have the rest of the plant receive as much sunlight as possible for the best bloom performance. Apply a layer of mulch at the base of the plant to help retain moisture and protect the roots in harsh weather conditions.
Happy Jack Clematis Spacing
These plants can grow to be very large. So we do not recommend growing them closer than 4 feet apart, even better if you plant them 6 feet apart. You may also grow these in containers, but be sure to provide a small trellis or some sort of structure for the vine to grow upwards on.
Happy Jack® Purple Clematis Vine 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
- Part Sun to Full Sun (5+ Hours Direct Sun)
- Mature Height
- 6-8 Feet
- Mature Spread
- 3-4 Feet
- Growth Habit
- , Climbing
- Water Needs
- Average
Flowers & Foliage
- Flower Colors
- , Purple
- Flower Description
- Purple
- Bloom Time
- Early Summer
- Blooms On
-
Both New and Old 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
- Lightly, right after the first flush of flowers
- Foliage Color
- , Green
- Foliage Description
- Green
- Foliage Type
- , Deciduous
- Seasonal Interest
- , Fall Flowering, Fall Interest
Garden Benefits
Plant Overview
- Common Name
- Happy Jack® Purple Clematis Vine
- Botanical Name
- Happy Jack Purple Clematis x 'Zojapur' USPP 20,343
- Brand
- Proven Winners
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
We stand behind our plants with industry-leading guarantees to give you peace of mind.
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!