Poor Bob Plant Care
Eriophorum tenellum Nutt.
Updated · Sources · How we source care data
Eriophorum tenellum is a species of flowering plant in the sedge family Cyperaceae.
Every 2–4 days
Full sun to part shade
50–75°F
60–80%
At a glance
How do you care for Poor Bob?
Water Poor Bob every 2–4 days, letting the top layer of soil dry out between waterings, and give it full sun to part shade. It prefers temperatures of 50–75°F (10–24°C) and 60–80% humidity.
What Is the Poor Bob?
Poor Bob (Eriophorum tenellum) belongs to the Cyperaceae family within the Eriophorum genus. Poor Bob is also known as Bog Cotton.
Poor Bob displays a grass-like perennial growth habit, reaching up to 3 ft tall with a spread of approximately 1 ft. Poor Bob produces small, brown spikelets.
Leaf size: approximately 12 inches.
How Often Should You Water a Poor Bob?
Eriophorum tenellum requires watering every 2–4 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.
Watering Frequency
Every 2–4 days
Let soil partially dry between waterings
What Light Does the Poor Bob Need?
Poor Bob thrives in full sun to part shade.
Light Requirement
Full sun to part shade
What Temperature and Humidity Does the Poor Bob Prefer?
Eriophorum tenellum grows best at temperatures of 50–75°F. Poor Bob prefers humidity levels of 60–80%. A pebble tray or humidifier helps maintain adequate moisture around the plant.
Temperature
50–75°F
Humidity
60–80%
What Soil Mix Works Best for a Poor Bob?
Moist, acidic peat or boggy soil. Good drainage is essential for Poor Bob to prevent waterlogging, which leads to root rot and fungal issues.
How Do You Repot a Poor Bob?
Divide clumps every 3-5 years. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.
How Do You Propagate a Poor Bob?
Poor Bob can be propagated through division, seeds. Similar propagation techniques also apply to virginia cotton grass plant care, which shares the same genus.
Is the Poor Bob Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Poor Bob, so we can't confirm whether it is safe for cats and dogs. Keep pets from chewing it as a precaution.
This is a general caution, not veterinary or medical advice. If your pet ate a plant, contact your vet or animal poison control.
See all plants toxic to cats and plants toxic to dogs.
What Pests and Diseases Affect the Poor Bob?
Poor Bob is susceptible to generally pest-free. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.
Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.
What USDA Hardiness Zone Does the Poor Bob Need?
Poor Bob grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. In cooler regions, grow Poor Bob as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 12a
Keep exploring plants
Poor Bob is one of many species covered in the complete plant care and identification guide, which groups plants by genus, attribute, and popularity.
It belongs to the Eriophorum genus — compare its care with other Eriophorum species on PlantoScan.
Eriophorum is part of the Cyperaceae plant family — browse all Cyperaceae genera and species.
Poor Bob thrives in bright light and direct sun — see other bright-light plants.
More Eriophorum Species
Other Eriophorum species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Eriophorum tenellum Nutt., family Cyperaceae (first published in Gen. N. Amer. Pl. : 2 add. (1818)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Poor Bob, so we can't confirm whether it is safe for cats and dogs. Checked against the ASPCA plant list; any other toxicity note on this page comes from PlantoScan's plant database.
- Hardiness zone: USDA Zone 12a, calculated from the plant's minimum temperature.
- Care values(watering, light, temperature, humidity, soil, fertilizing): PlantoScan's plant database, filtered by automatic plausibility checks — values that fail them are hidden. How we source and check plant data.
Spotted a mistake? Email info@upvision.media with the page link — we check and correct reported errors.
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