SKU: 88003778625
comfrey seeds or plants

comfrey seeds or plants Comfrey Bocking #4 (Symphytum uplandicum)

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Description

comfrey seeds or plants Comfrey Bocking #4 (Symphytum uplandicum)Comfrey, Bocking #4 (Symphytum uplandicum Bocking 4) Bocking #4 comfrey is a vigorous, deep rooted perennial known for its exceptional biomass production, nutrient accumulation, and value in regenerative garden systems. Selected in England for its high yield and resilience, this cultivar is especially useful in composting, mulching, and soil building strategies. While less commonly used medicinally than wild comfrey, it remains a cornerstone plant for

Comfrey, Bocking #4 (Symphytum × uplandicum ‘Bocking 4’)

Bocking #4 comfrey is a vigorous, deep-rooted perennial known for its exceptional biomass production, nutrient accumulation, and value in regenerative garden systems. Selected in England for its high yield and resilience, this cultivar is especially useful in composting, mulching, and soil-building strategies. While less commonly used medicinally than wild comfrey, it remains a cornerstone plant for permaculture and homestead-scale fertility systems.

Key Characteristics

Dynamic accumulator for nutrient cycling
Bocking #4 develops a deep taproot that mines nutrients—especially potassium, calcium, and trace minerals—from subsoil layers. These nutrients are concentrated in its large leaves, which can be cut multiple times per season and used as a nutrient-rich mulch around fruit trees, vegetables, or perennial crops. This makes it a key plant for closed-loop fertility systems.

High biomass production for mulch and compost
This cultivar is known for producing abundant leafy growth, often allowing for 3–5 cuttings per growing season. The leaves break down quickly, making them ideal for “chop-and-drop” mulching, compost acceleration, or layering in sheet mulch systems. It is one of the most efficient plants for generating on-site organic matter.

Sterile, non-invasive clumping form
Unlike common comfrey, Bocking #4 is a sterile cultivar that does not set viable seed, reducing the risk of unwanted spread. It grows in a defined clump that gradually expands over time, making it easier to manage in intentional plantings such as orchard guilds or designated fertility patches.

Essential plant for orchard guilds and permaculture systems
Bocking #4 is widely used around fruit trees where it acts as a living mulch, nutrient pump, and pollinator-support plant. Its early-season flowers provide nectar for bees, while its large leaves shade soil and reduce moisture loss. It is especially valuable in food forests, silvopasture edges, and regenerative agriculture systems focused on soil building.

  • Native range: Hybrid of European species (cultivar developed in England)
  • Plant life cycle: Perennial
  • Sun requirements: Full sun to partial shade
  • Soil requirements: Medium to medium-wet
  • Mature height: 2–4 feet
  • Bloom time: May – July
  • Bloom color: Purple to blue
  • USDA Hardiness zones: 4–9

For best results, plant Bocking #4 where it can remain long-term. Cut regularly to maximize biomass and nutrient cycling, and position it strategically where its leaves can be easily harvested and redistributed throughout your system.

Shipping Notes
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Exchange/Return Notes
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SKU: 88003778625

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Carrie
Phoenix, US
★★★★★ 4
Heavy duty for sure
Color: Purple
Heavy duty toy. This ball has some weight to it! I have a smaller laber doodle that thinks she's a German Shepard so no toy is too big or heavy for her. She's been chewing on this for months but you'd never know it. The squeaker is even hard for me to activate with my hands. She hits it in the right spot every now and again and gets excited about it. Great if your not crazy about hearing a squeaker squeaking non stop!
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Reviewed in the United States on May 10, 2026
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Theresa Kellat Mcilraith
Houston, US
★★★★★ 5
All dog sizes can enjoy this ball!
Color: Orange
This is a terrific dog ball! Our Pittie can't tear it apart on day 2 which is unusual! Also, its big enough that he can't swallow it but not so huge that our mini Doodle can't enjoy it too! We have more than one of these to keep our pups busy!
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Reviewed in the United States on June 7, 2026
T
Verified Purchase
Tanner Pence
Phoenix, US
★★★★★ 5
Great quality
Color: Purple, Color: Purple
My dog loves to chew and this toy is indestructible! She loves it!
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Reviewed in the United States on June 10, 2026
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Verified Purchase
D. Rodriguez
Waukegan, US
★★★★★ 5
Finally, a ball that made it!
Color: Blue, Color: Blue
I don’t know what is it with this ball, but it’s special. My dogs can absolutely tear up anything and this one seems like it can be chewed up but my dog loves it too much. He carries it all day, nibbles it and loves the squeaky sound of course. Finally found a winner!
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Reviewed in the United States on May 20, 2026
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Renae
Port Orchard, US
★★★★★ 5
Good size ball for my big boy
Color: Purple
My big boy loves this ball. He chews and chews and chews on it and it ain't made a dent in it. It's made a good quality rubber. It's got a squeaker in it. He hasn't managed to get it out which is not normal because normally he can get a squeaky out within 10 minutes. He goes through toys like I don't know what so it's being being a good. Really good ball. We've had it for about 2-3 months now and he hasn't been able to break into it and get squeaky out or even make a dent into it. That would tear up the the rubber
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Reviewed in the United States on June 1, 2026

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