🌿 Persicaria sp. 'Kawagoeanum' – Orange-Red Willow-Leaved Knotweed for Vibrant Midgrounds

Persicaria sp. 'Kawagoeanum' is a fast-growing aquatic stem plant native to Asia, admired for its narrow, willow-like leaves and rich coloration when submerged. At Aquarium Plants Factory nursery, we cultivate this plant emersed, where its leaves remain bright green and its stems grow sturdy and upright. Once introduced into a planted aquarium, the leaves undergo a dramatic transformation—shifting to glowing tones of orange-red to pink under strong light and CO₂ supplementation.

This species is sometimes mislabeled in the hobby as Persicaria sp. 'Red', Polygonum sp. 'Kawagoneum', or incorrectly as Persicaria sp. 'Sao Paulo', but its vivid coloration and graceful form make it a standout in any layout. Underwater, its 8–12 cm long, 0.6–1 cm wide leaves provide elegant motion and contrast in the midground of aquascapes. In emersed setups like paludariums or wabi-kusa, the plant develops a more shrub-like growth and can even flower when left untrimmed.

Persicaria sp. 'Kawagoeanum' thrives with nutrient-rich substrates, regular dosing of macro- and micronutrients, and steady CO₂. As the plant matures, older stems may become leggy or drop lower leaves—regular trimming and replanting of top cuttings are key for a clean, vibrant display.

🌟 Key Features:

• Scientific Name: Persicaria sp. 'Kawagoeanum'

• Also Known As: Persicaria sp. 'Red', Polygonum sp. 'Kawagoneum', Persicaria sp. 'Sao Paulo' (incorrect)

• Leaf Form: Long, willow-like blades

• Coloration: Green in emersed form; transitions to orange-red or pink when submerged under strong light

• Growth Form: Upright stems with moderate branching

• Size Range: Up to 30–40 cm tall in aquariums

• Cultivation Method: Grown emersed at Aquarium Plants Factory

• Ideal Placement: Midground color accent

🌱 Growth & Propagation:

• Lighting Needs: Medium to high (higher light triggers more intense color)

• CO₂: Strongly recommended for optimal growth and red pigmentation

• Nutrients: Requires both substrate and water column fertilization

• Growth Rate: Moderate to fast

• Trimming Tips: Top cuttings re-root easily; remove older, bare stems

• Emersed Growth: Easily adapts to moist, nutrient-rich soil and can flower in open-top tanks

🪴 What You’ll Receive:

• Fresh-Cut Plants: Approx. 6 fresh-cut stems, loose and without roots

• Bunched Plants: Approx. 6 fresh-cut stems bundled with foam and plant weight

• Potted Plants: Approx. 6 fresh-cut stems, potted in net pot with Rockwool

🖼️ Aquascaping Benefits:

• Adds warm, natural contrast with its orange-red submerged coloration

• Offers soft, flowing texture that enhances depth in midground layouts

• Ideal for nature-style, Dutch-style, or wild-themed aquascapes

• Great for transition zones between low-growing plants and taller backgrounds

• Suitable for both submerged tanks and emersed displays like wabi-kusa or paludariums

⚠️ Disclaimer:
This plant ships in its emersed form with green leaves. Color transformation will occur once adapted to submerged conditions with adequate CO₂ and strong lighting. Trimming and replanting top portions helps maintain a fresh, healthy appearance.

🚫 State Restrictions Notice ♻️ Be a Responsible Aquatic Plants Owner
Never release Persicaria sp. 'Kawagoeanum'—or any aquarium plant—into local waterways. Improper disposal can disrupt native habitats. Dispose of trimmings and plant waste responsibly.

 WHAT WE GUARANTEE

24 Hours Live Arrival Guarantee* - In a rare case of live stocks dead on arrival, we must be notified within 24 hours by the same day of delivery. Please take clear photos of the damaged product and send it to us within 24 hours.  Live Arrival Guarantee will be void after 24 hours of delivery. All replacements are considered final and we will not replace the replacement.

1. Picture requirements: Take at least 2 clear photos of damaged product in their original, unopened & sealed transparent packing and send photos and orders information to our email within 24 hours: aquariumplantsfactory@gmail.com 
2. Please do not take picture of damaged plants, or animals in your aquarium. Once they have been introduced to your aquarium's ecosystem. It is no longer covered by our guarantee.

Please be aware that our Live Arrival Guarantee is subject to certain conditions. Specifically, the guarantee will not be applicable in cases where the package is marked as 'invalid address', 'undeliverable' or is 'returned to sender.' This includes situations such as a vacant delivery address, a missing apartment number, or any other issues that prevent the postal service from delivering your package.

It is crucial to provide accurate and complete shipping information to ensure the successful delivery of your order and the applicability of the Live Arrival Guarantee.

Please keep in mind that Live Arrival Guarantee only guarantees that live stocks will be alive upon arrival. We cannot guarantee that you will continue to have success with them. Many factors, including the aquarium environment, water quality, nutrient, temperature, lighting, filter, and CO2 system, can contribute to the failure to grow live plants and live animals.

WHAT WE CAN'T GUARANTEE

Even though our plants are very clean, but we can't guarantee they will be 100% pest-free because we cannot be responsible for your aquarium. Please use it at your own risk. We recommended all customers rinse the plants with clean water and quarantine them before use.

However, plants in tissue culture will be 100% free from pests, algae and never have been contacting with any aquarium.

1. Due to the nature of the product. We don't guarantee our plants will be pests free. ( snails, algae, hitchhikers )
2. We don't guarantee our plants will be free of pesticides. We use homemade, organic pesticides in our greenhouse to control pests. We do not use pesticides that contain copper. Copper is toxic to invertebrates such as aquatic snails, crabs, shrimps, etc
3. We don't guarantee your aquarium success or are responsible for your aquarium inhabitant including but not limited to fish, shrimp, snail, turtle, etc. So please quarantine all plants when use!
4. Unless specific, we don't guarantee aquatic plants will be grow emerged or submerge.

Please review your state's regulations on restricted plants, as we are committed to not shipping plants that are restricted in your area. Do not release any plants into the wild or waterways, as this can harm local ecosystems by introducing invasive species.

Your cooperation in protecting the environment is appreciated. For continuously updated information, refer to the USDA State Noxious Weed list here.

Thank you for your responsible commitment to environmental preservation.