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Berberis thunbergii 'Koren' Plant Care Reminders

Sunjoy citrus barberry

Japanese Barberry

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General Information

  • Instruction By Proven Winners
    Notes SUNJOY CITRUS barberry has a neat, rounded habit that results in a uniformly ball-shaped plant. It makes an excellent low-maintenance hedge, needing little if any pruning to maintain its shape. This plant was evaluated for over five years in full sun to ensure excellent burn-resistance, so it will perform better in full sun than other yellow barberries. Use its bright, season-long color and neat, rounded habit. as a Hedge, in shrub borders, or within foundation plantings.
    Deer resistant.
    Sunset Zones
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    USDA Zones
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    Web Link http://www.provenwinners.com/plants/berberis/sunjoy-citrus-barberry-berberis-thunbergii

Plant Care Instruction

  • Scroll down or click on any month for plant care instructions
    • January
    • February
    • March
    • April
    • May
    • June
    • July
    • August
    • September
    • October
    • November
    • December
    January
    1. Prune

    Do not prune.
    February
    1. Prune

    Do not prune.
    March
    1. Buy

    Purchase shrubs after the threat of frost has passed. If you buy sooner, be sure to provide protection to the tender new top growth at night. When choosing plants, don't be shy about popping the plant out of its pot to inspect the roots; the root mass should be free of black, mushy sections and amply fill the container. Remember, the more roots the better!
    2. Plant

    Plant as soon as the threat of frost has passed and the soil is workable. If the threat of frost persists, be sure to provide protection to tender new growth of the plant by covering at night. Plant SUNJOY CITRUS in full sun. It is extremely adaptable but does need well drained soil. Apply a granular slow release fertilizer and water in well. It is recommended to apply 1 inch of water per week during the first growing season and be extra mindful during periods of heat and drought.
    3. Fertilize

    Fertilize in early spring by applying a slow release fertilizer specialized for trees and shrubs. Follow the label for recommended rate of application.
    4. Prune

    Do not prune.
    5. Mulch

    Applying mulch around your flowering shrubs in the spring is a great idea. Not only does it look attractive, it keeps roots cool, conserves soil moisture, reduces water requirements, and acts as an effective weed barrier. Spread mulch evenly to a depth of 2 to 3 inches (if replenishing, don't allow build up to exceed 4" in depth). If your shrub is in lawn, mulch a ring between 3 to 6 feet in diameter around the trunk. Be careful to keep mulch an inch away from the shrub's trunk.
    April
    1. Buy

    Purchase shrubs after the threat of frost has passed. If you buy sooner, be sure to provide protection to the tender new top growth at night. When choosing plants, don't be shy about popping the plant out of its pot to inspect the roots; the root mass should be free of black, mushy sections and amply fill the container. Remember, the more roots the better!
    2. Plant

    Plant as soon as the threat of frost has passed and the soil is workable. If the threat of frost persists, be sure to provide protection to tender new growth of the plant by covering at night. Plant SUNJOY CITRUS in full sun. It is extremely adaptable but does need well drained soil. Apply a granular slow release fertilizer and water in well. It is recommended to apply 1 inch of water per week during the first growing season and be extra mindful during periods of heat and drought.
    3. Fertilize

    Fertilize in early spring by applying a slow release fertilizer specialized for trees and shrubs. Follow the label for recommended rate of application.
    4. Water

    As a rule of thumb, apply 1 inch of water per week during the first growing season. Be mindful of hot days and periods of drought. Once established, SUNJOY CITRUS has average water requirements.
    5. Prune

    Do not prune.
    6. Mulch

    Applying mulch around your flowering shrubs in the spring is a great idea. Not only does it look attractive, it keeps roots cool, conserves soil moisture, reduces water requirements, and acts as an effective weed barrier. Spread mulch evenly to a depth of 2 to 3 inches (if replenishing, don't allow build up to exceed 4" in depth). If your shrub is in lawn, mulch a ring between 3 to 6 feet in diameter around the trunk. Be careful to keep mulch an inch away from the shrub's trunk.
    May
    1. Buy

    It isn't too late to add to your garden. When choosing plants, don't be shy about popping the plant out of its pot to inspect the roots; the root mass should be free of black, mushy sections and amply fill the container. Remember, the more roots the better!
    2. Plant

    May isn't too late to add new plants to your garden! Plant SUNJOY CITRUS in full sun. It is extremely adaptable but does need well drained soil. Apply a granular slow release fertilizer and water in well. It is recommended to apply 1 inch of water per week during the first growing season and be extra mindful during periods of heat and drought.
    3. Water

    As a rule of thumb, apply 1 inch of water per week during the first growing season. Be mindful of hot days and periods of drought. Once established, SUNJOY CITRUS has average water requirements.
    4. Prune

    Do not prune.
    June
    1. Water

    As a rule of thumb, apply 1 inch of water per week during the first growing season. Be mindful of hot days and periods of drought. Once established, SUNJOY CITRUS has average water requirements.
    2. Prune

    Do not prune.
    July
    1. Water

    As a rule of thumb, apply 1 inch of water per week during the first growing season. Be mindful of hot days and periods of drought. Once established, SUNJOY CITRUS has average water requirements.
    2. Prune

    Pruning is seldom needed, but may be shaped in summer if necessary.
    August
    1. Water

    As a rule of thumb, apply 1 inch of water per week during the first growing season. Be mindful of hot days and periods of drought. Once established, SUNJOY CITRUS has average water requirements.
    2. Prune

    Pruning is seldom needed, but may be shaped in summer if necessary.
    September
    1. Buy

    Visit your independent garden center now because fall is the best time to purchase shrubs! Here's why: In the spring, a new plant would have to divide its energy between settling into a new home and growing immediately. In the fall however, the short days are causing the top to go dormant. All the while, the warm soil, which will persist for the coming weeks or months, provides the perfect environment for roots to acclimate. Once spring arrives, the happily established plant can focus on growing and flowering. When choosing plants, don't be shy about popping the plant out of its pot to inspect the roots; the root mass should be free of black, mushy sections and amply fill the container. Remember, the more roots the better!
    2. Plant

    Planting flowering shrubs now is a great time to get a jump on next year's garden! Plant SUNJOY CITRUS in full sun. It is extremely adaptable but does need well drained soil. Save the application of a granular slow-release fertilizer for spring to avoid the initiation of tender new growth. It is recommended to apply 1 inch of water per week during the first growing season and be extra mindful during periods of heat and drought.
    3. Water

    As a rule of thumb, apply 1 inch of water per week during the first growing season. Be mindful of hot days and periods of drought. Once established, SUNJOY CITRUS has average water requirements.
    4. Prune

    Do not prune.
    October
    1. Buy

    Visit your independent garden center now because fall is the best time to purchase shrubs! Here's why: In the spring, a new plant would have to divide its energy between settling into a new home and growing immediately. In the fall however, the short days are causing the top to go dormant. All the while, the warm soil, which will persist for the coming weeks or months, provides the perfect environment for roots to acclimate. Once spring arrives, the happily established plant can focus on growing and flowering. When choosing plants, don't be shy about popping the plant out of its pot to inspect the roots; the root mass should be free of black, mushy sections and amply fill the container. Remember, the more roots the better!
    2. Plant

    Planting flowering shrubs now is a great time to get a jump on next year's garden! Plant SUNJOY CITRUS in full sun. It is extremely adaptable but does need well drained soil. Save the application of a granular slow-release fertilizer for spring to avoid the initiation of tender new growth. It is recommended to apply 1 inch of water per week during the first growing season and be extra mindful during periods of heat and drought.
    3. Water

    As a rule of thumb, apply 1 inch of water per week during the first growing season. Be mindful of hot days and periods of drought. Once established, SUNJOY CITRUS has average water requirements.
    4. Prune

    Do not prune.
    5. Mulch

    Applying a winter top-dressing of mulch will provide protection to the roots from severe winter temperatures and frost heaving. Spread mulch evenly to a depth of 2 to 3 inches (if replenishing, don't allow build up to exceed 4" in depth). If your shrub is in lawn, mulch a ring between 3 to 6 feet in diameter around the trunk. Be careful to keep mulch an inch away from the shrub's trunk.
    November
    1. Prune

    Do not prune.
    2. Mulch

    Applying a winter top-dressing of mulch will provide protection to the roots from severe winter temperatures and frost heaving. Spread mulch evenly to a depth of 2 to 3 inches (if replenishing, don't allow build up to exceed 4" in depth). If your shrub is in lawn, mulch a ring between 3 to 6 feet in diameter around the trunk. Be careful to keep mulch an inch away from the shrub's trunk.
    December
    1. Prune

    Do not prune.
  • Buy

    When's the best time to buy this plant? When can you buy these from seed (if you can)? When is it usually available? What are things to look for when you're buying it? Or anything other tidbit of information you can share!

    March

    Purchase shrubs after the threat of frost has passed. If you buy sooner, be sure to provide protection to the tender new top growth at night. When choosing plants, don't be shy about popping the plant out of its pot to inspect the roots; the root mass should be free of black, mushy sections and amply fill the container. Remember, the more roots the better!

    April

    Purchase shrubs after the threat of frost has passed. If you buy sooner, be sure to provide protection to the tender new top growth at night. When choosing plants, don't be shy about popping the plant out of its pot to inspect the roots; the root mass should be free of black, mushy sections and amply fill the container. Remember, the more roots the better!

    May

    It isn't too late to add to your garden. When choosing plants, don't be shy about popping the plant out of its pot to inspect the roots; the root mass should be free of black, mushy sections and amply fill the container. Remember, the more roots the better!

    September

    Visit your independent garden center now because fall is the best time to purchase shrubs! Here's why: In the spring, a new plant would have to divide its energy between settling into a new home and growing immediately. In the fall however, the short days are causing the top to go dormant. All the while, the warm soil, which will persist for the coming weeks or months, provides the perfect environment for roots to acclimate. Once spring arrives, the happily established plant can focus on growing and flowering.

    When choosing plants, don't be shy about popping the plant out of its pot to inspect the roots; the root mass should be free of black, mushy sections and amply fill the container. Remember, the more roots the better!

    October

    Visit your independent garden center now because fall is the best time to purchase shrubs! Here's why: In the spring, a new plant would have to divide its energy between settling into a new home and growing immediately. In the fall however, the short days are causing the top to go dormant. All the while, the warm soil, which will persist for the coming weeks or months, provides the perfect environment for roots to acclimate. Once spring arrives, the happily established plant can focus on growing and flowering.

    When choosing plants, don't be shy about popping the plant out of its pot to inspect the roots; the root mass should be free of black, mushy sections and amply fill the container. Remember, the more roots the better!

    Plant

    When's a good time to plant this plant or bulb? Any special planting instructions?

    March

    Plant as soon as the threat of frost has passed and the soil is workable. If the threat of frost persists, be sure to provide protection to tender new growth of the plant by covering at night.

    Plant SUNJOY CITRUS in full sun. It is extremely adaptable but does need well drained soil. Apply a granular slow release fertilizer and water in well. It is recommended to apply 1 inch of water per week during the first growing season and be extra mindful during periods of heat and drought.

    April

    Plant as soon as the threat of frost has passed and the soil is workable. If the threat of frost persists, be sure to provide protection to tender new growth of the plant by covering at night.

    Plant SUNJOY CITRUS in full sun. It is extremely adaptable but does need well drained soil. Apply a granular slow release fertilizer and water in well. It is recommended to apply 1 inch of water per week during the first growing season and be extra mindful during periods of heat and drought.

    May

    May isn't too late to add new plants to your garden!

    Plant SUNJOY CITRUS in full sun. It is extremely adaptable but does need well drained soil. Apply a granular slow release fertilizer and water in well. It is recommended to apply 1 inch of water per week during the first growing season and be extra mindful during periods of heat and drought.

    September

    Planting flowering shrubs now is a great time to get a jump on next year's garden!

    Plant SUNJOY CITRUS in full sun. It is extremely adaptable but does need well drained soil. Save the application of a granular slow-release fertilizer for spring to avoid the initiation of tender new growth. It is recommended to apply 1 inch of water per week during the first growing season and be extra mindful during periods of heat and drought.

    October

    Planting flowering shrubs now is a great time to get a jump on next year's garden!

    Plant SUNJOY CITRUS in full sun. It is extremely adaptable but does need well drained soil. Save the application of a granular slow-release fertilizer for spring to avoid the initiation of tender new growth. It is recommended to apply 1 inch of water per week during the first growing season and be extra mindful during periods of heat and drought.

    Fertilize

    When should you fertilize this plant? Which kind of fertilizer do you recommend? Should you use different fertilizers at different times of year?

    March

    Fertilize in early spring by applying a slow release fertilizer specialized for trees and shrubs. Follow the label for recommended rate of application.

    April

    Fertilize in early spring by applying a slow release fertilizer specialized for trees and shrubs. Follow the label for recommended rate of application.

    Water

    Is there a time to reduce or increase watering? Any special requirements? Things to avoid during certain times of the year?

    April

    As a rule of thumb, apply 1 inch of water per week during the first growing season. Be mindful of hot days and periods of drought. Once established, SUNJOY CITRUS has average water requirements.

    May

    As a rule of thumb, apply 1 inch of water per week during the first growing season. Be mindful of hot days and periods of drought. Once established, SUNJOY CITRUS has average water requirements.

    June

    As a rule of thumb, apply 1 inch of water per week during the first growing season. Be mindful of hot days and periods of drought. Once established, SUNJOY CITRUS has average water requirements.

    July

    As a rule of thumb, apply 1 inch of water per week during the first growing season. Be mindful of hot days and periods of drought. Once established, SUNJOY CITRUS has average water requirements.

    August

    As a rule of thumb, apply 1 inch of water per week during the first growing season. Be mindful of hot days and periods of drought. Once established, SUNJOY CITRUS has average water requirements.

    September

    As a rule of thumb, apply 1 inch of water per week during the first growing season. Be mindful of hot days and periods of drought. Once established, SUNJOY CITRUS has average water requirements.

    October

    As a rule of thumb, apply 1 inch of water per week during the first growing season. Be mindful of hot days and periods of drought. Once established, SUNJOY CITRUS has average water requirements.

    Prune

    When's a good time to prune this plant? How about deadheading, pinching back, trimming or any other grooming? Any special requirements?

    January

    Do not prune.

    February

    Do not prune.

    March

    Do not prune.

    April

    Do not prune.

    May

    Do not prune.

    June

    Do not prune.

    July

    Pruning is seldom needed, but may be shaped in summer if necessary.

    August

    Pruning is seldom needed, but may be shaped in summer if necessary.

    September

    Do not prune.

    October

    Do not prune.

    November

    Do not prune.

    December

    Do not prune.

    Mulch

    Does this plant need to be mulched? Are there specific types of Mulch which are better for this plant? How much?

    March

    Applying mulch around your flowering shrubs in the spring is a great idea. Not only does it look attractive, it keeps roots cool, conserves soil moisture, reduces water requirements, and acts as an effective weed barrier.

    Spread mulch evenly to a depth of 2 to 3 inches (if replenishing, don't allow build up to exceed 4" in depth). If your shrub is in lawn, mulch a ring between 3 to 6 feet in diameter around the trunk. Be careful to keep mulch an inch away from the shrub's trunk.

    April

    Applying mulch around your flowering shrubs in the spring is a great idea. Not only does it look attractive, it keeps roots cool, conserves soil moisture, reduces water requirements, and acts as an effective weed barrier.

    Spread mulch evenly to a depth of 2 to 3 inches (if replenishing, don't allow build up to exceed 4" in depth). If your shrub is in lawn, mulch a ring between 3 to 6 feet in diameter around the trunk. Be careful to keep mulch an inch away from the shrub's trunk.

    October

    Applying a winter top-dressing of mulch will provide protection to the roots from severe winter temperatures and frost heaving.

    Spread mulch evenly to a depth of 2 to 3 inches (if replenishing, don't allow build up to exceed 4" in depth). If your shrub is in lawn, mulch a ring between 3 to 6 feet in diameter around the trunk. Be careful to keep mulch an inch away from the shrub's trunk.

    November

    Applying a winter top-dressing of mulch will provide protection to the roots from severe winter temperatures and frost heaving.

    Spread mulch evenly to a depth of 2 to 3 inches (if replenishing, don't allow build up to exceed 4" in depth). If your shrub is in lawn, mulch a ring between 3 to 6 feet in diameter around the trunk. Be careful to keep mulch an inch away from the shrub's trunk.

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