Caesars Brother Siberian Iris

As low as $49.79 was $59.99
Availability: In stock

The Caesar's Brother Iris (Iris sibirica 'Caesar's Brother') is a fantastic clumping perennial with tall sword-like bluish-green foliage that supports rich, deep intense blue flowers with splashes of yellow on the lower petals. Caesar's Brother is one of the most easily grown Iris, blooming from late spring into summer.

The clumping upright form and texture and the clumps will grow together and snuff out most weeds. They make magnificent cut flowers as the violet-blue flowers are held aloft on rigid stems. Butterflies and hummingbirds will stop by for a visit to wriggle between the petals in search of nectar and Bees too will forage for pollen!

It is an easily grown Iris, and it spreads by rhizomes, so if planted this year, it will be even bigger and better in a season or two! A form of Siberian Iris, these perennials are hardy throughout USDA planting zones 3 to 9!

Planting and Application:

Caesar's Brother Iris is useful in many ways and is best used around high moisture to moist locations. From Rain Garden, to around pools and ponds, and water gardens! They spread politely to create clumps and drifts for easy naturalizing and mass plantings.

It can be planted on difficult banks and prevent erosion, stabilize soil on the banks of water features, or planted in winding ribbons and drifts throughout the landscape! A vivid accent throughout Cottage Gardens, mixed Perennial borders, and along the foundation of your home or outbuilding.

Pollinator beds and cut flower gardens too are great locations for these showy flowering plants, just be sure to provide some extra water!

  • Intensely Blue Flowers With Yellow Accents
  • Blooms Spring Through Summer!
  • Clump-Forming Rhizomes
  • Great Cut Flowers & Pollinator Friendly
  • Rain Gardens & Pollinator Gardens, Sunny Landscapes & Containers

#ProPlantTips For Care

Iris prefers moist, well-drained soil in full sun, but will tolerate some afternoon shade. This Iris needs plenty of water throughout the season to look its best. It can also tolerate poor, dry soil because its thick roots penetrate the soil deeply but grow and flower best when planted in rich, well-drained moisture. In average garden settings, provide supplemental water during periods without rain, and 3-4 inches of arborist mulch to regulate soil moisture and enrich the area as it breaks down.

Containing chemicals that deter deer and rabbits make these carefree plants and the roots are rarely bothered by burrowing rodents. Deadhead the flowers as they fade and trim back the foliage in the autumn. Every 3-5 years, divide the clumps and rearrange the rhizomes to keep them in tight formation and to prevent them from being buried too deeply, preferring to be planted more shallowly in the ground, the top 1/3 of each rhizome should be exposed and 2/3 of it should be below ground for best results. For the winter, loosely cover your Iris in a layer of clean leaves or evergreen boughs, straw or compost, pulling it back in the spring.

  • Full Sun & Afternoon Shaded Locations
  • Loves Moist to Average Moisture
  • Well-Drained Rich Soil
  • Deadhead After Flowers Fade & Trim Stems in Late Autumn
  • Iris Contain Toxic Compounds That Deter Deer

A splendid blossom for any setting, Caesar's Brother will please you with its intense blue flowers in early summer and return effortlessly year after year! Order a Caesar's Brother Iris plant from today!

Buying Options for Plants

Nature Hills sells a large variety of plants with several options available. Plants are offered in both potted containers and as dormant bare root without soil. Here is a helpful resource to understand your options as you create a beautiful landscape with help from Nature Hills.

Ever wonder what a larger plant will mean for your landscape? Container Sizes are really all about the age of the plant!

Seasonally, Nature Hills offers hand selected, high quality bare root trees, shrubs and perennials. Bare root plants are sold by height from the top of the root system to the top of the plant. Plants may be taller than the height minimums.

  • Popular sizes of select trees are 1 foot, 2 feet, 3 feet, etc.
  • Popular sizes of select bare root plants is 1 foot, 18 inches, etc.

Nature Hills Container Size by Volume

Keep in mind, specific varieties and different growing conditions can affect the rate at which plants grow. Variations in size may occur.

Young Plants to 18 Months
Size Volume
2"x2"x3" Ranges from .18 to .21 dry quarts / .198 to .23 dry liters in volume
4.5" Container Equal to .65 dry quart / .72 dry liter in volume
Sprinter Pot Equal to .63 dry quart / .69 dry liter in volume
4" Container Ranges from .31 to .87 / .35 to .96 dry liter in volume
6" Container Equal to 1.4 dry quarts / 1.59 dry liters in volume
1 Quart Equal to 1 dry quart / 1.1 dry liter in volume
5.5" Container Equal to 1.89 of a dry quart / 2.08 dry liters in volume
4"x4"x5" Ranges from .8 to 1.1 dry quarts / .88 to 1.2 dry liters in volume
4"x4"x6" Ranges from 1.0 to 1.3 dry quarts / 1.1 to 1.41 dry liters in volume
4"x4"x9" Ranges from 1.1 to 2.1 dry quarts / 1.2 to 2.3 dry liters in volume
4"x4"x10" Ranges from 1.7 to 2.3 dry quart / 1.87 to 2.53 dry liters in volume
Plants 18 Months - 2.5 Years Old
Size Volume
2 Quart Equal to 2 dry quarts / 2.2 dry liters in volume
#1 Container Ranges from 2.26 to 3.73 dry quarts / 2.49 to 4.11 dry liters in volume
5"x5"x12" Equal to 3.5 to 4.3 dry quarts / 3.85 to 4.74 dry liters in volume
Plants 2 - 4 Years Old
Size Volume
#2 Container Ranges from 1.19 to 1.76 dry gallons / 5.24 to 7.75 dry liters in volume
#3 Container Ranges from 2.32 to 2.76 dry gallons / 10.22 to 12.16 dry liters in volume
Plants 3 - 5 Years Old
Size Volume
#5 Container Ranges from 2.92 to 4.62 dry gallons / 12.86 to 20.35 dry liters in volume
#6 Container Ranges from 5.25 to 6.01 dry gallons / 23.12 to 26.42 dry liters in volume
#7 Container Ranges from 5.98 to 6.08 dry gallons / 26.34 to 26.78 dry liters in volume

About Plant Sentry™

Plant Sentry is designed to protect both consumers and the nursery trade from invasive plant pests and diseases. Sites that display the Plant Sentry protection badge are protected from consumers buying and nurseries shipping material carrying invasive pests and diseases.

This proprietary eCommerce software prevents the shipment of a restricted plant to each state. The Plant Sentry system includes a shipment certification program. The Plant Sentry Compliance Officer works closely with and each nursery or fulfillment center to ensure only compliant plants are sold to customers.

Click Here to learn more

Plant Sentry


To obtain a more accurate shipment time-frame, simply enter your zip code in the “Find Your Growing Zone” box to the right. Our plants are grown all over the country and lead time on items may be different because of this. Once your order is placed, you will also receive the specific shipment time-frame information as part of your order confirmation. Once an item ships, you will receive shipment notification and tracking numbers, so you can follow along while your plant travels to your doorstep. We use FedEx, UPS, or USPS at our discretion.

Due to winter weather we have put a hold on shipping to the areas shown below in grey. You can still order now and we will ship the plant to you during an appropriate time for your zone.

*If you have found your zone already, it will be highlighted in the table below.
Color Zone Times
3 Spring 2019
4 Now
5 Now
6 Now
7 Now
8 Now
9 Now
10 Now
11 Now

Shipping Rates

At Nature Hills we handle, package and ship the products you order with the utmost care to ensure healthy delivery. Shipping and handling charges are calculated based on the tables below. Please note that some items include an additional handling surcharge, these will be noted on the item's product page.

From To S&H
0 - 19.99 24.99
20 - 49.99 29.99
50 - 69.99 34.99
70 - 99.99 39.99
100 - 129.99 44.99
130 - 149.99 48.99
150 - 150+ Approx 28%

Click here to see our full rates


Caesars Brother Siberian Iris Is Suited to Grow in Zones 3-9
Growing Zones 3-9
More Information
Brand Nature Hills' Choice
Botanical Name Iris sibirica 'Caesar's Brother'
Type Perennial
Mature Height 36 inches
Mature Spread 18 - 24 inches
Sun Exposure Full Sun
Soil Widely Adaptable
Moisture Moderate to Higher
Growth Rate Fast
Flower Color Lavender
Foliage Deep Green
Pollinator Friendly Yes
Pruning Time Late Autumn
Fragrant Yes