Growli

Plant care

Kitten Tails (Kittentails) care

Besseya bullii

Also called Kitten tails, Kittentails, Bull's besseya.

RHS H7USDA 3-5Mildly toxic to petsIndoor 20–40 cm (8–16 in) tall in flower

Watering rhythm

Medium indirect light (a couple of metres from a window)

Infrequently; dry to medium-dry

Light

Medium indirect light (a couple of metres from a window)

Soil

Sandy or gravelly, dry, infertile, well-drained

Humidity

Low to moderate (30–55 % RH)

Temp

-40 to 30 °C

Pet safety

Mildly toxic to pets

Mature size

20–40 cm (8–16 in) tall in flower

Care at a glance

Light

The Goldilocks zone. Not the south-facing windowsill (too hot, too direct), not the back of the room (too dim, growth stalls). Thrives in dappled sunlight or on north-facing slopes and open woodland edges; can also tolerate full sun in sandy soils that stay cool. Avoid deep shade, which prevents flowering. If you can't decide, a free phone lux-meter app aimed at the leaf at noon should read between 800 and 1,500 lux.

Watering

Watering kitten tails: infrequently; dry to medium-dry. The number that matters isn't the day of the week — it's how dry the top 2-3 cm of the pot feels. A finger in the soil tells you more than a watering app. After every watering, tip the saucer. Naturally found on dry, sandy, or gravelly prairie and savanna soils; water sparingly after establishment. Moist or poorly drained soils are unsuitable and promote crown rot.

Soil and pot

Kitten Tails grows best in sandy or gravelly, dry, infertile, well-drained. Native to lean, acidic to neutral sandy substrates — rich garden soils encourage weedy competition that quickly overtops this small plant. Replicate prairie grit conditions for best results. A pot with a working drainage hole is non-negotiable for this species — even free-draining mix will turn soggy in a closed planter. If you love the look of a decorative pot without a hole, use it as a cachepot around an inner nursery pot you can lift out to water.

Humidity and temperature

Kitten Tails sits happiest at around Low to moderate (30–55 % RH) humidity and -40 to 30 °C (-40 to 86 °F). Adapted to the variable humidity of the Upper Midwest; good air circulation around the basal rosette is important to prevent fungal leaf spot in wet seasons. If you keep the room above year-round and avoid placing the plant near a cold draught, a hot radiator, or an air-conditioning vent, you have already handled the two biggest indoor stressors.

Fertilising

Feed kitten tails sparingly. Do not fertilise — additional nutrients favour competing weeds and grasses that suppress this small, slow-growing wildflower. Skip fertiliser entirely on a stressed, recently-repotted, or actively wilting plant — fertiliser salts make damage worse, not better. Wait for a round of healthy new growth before resuming a feeding rhythm.

Common problems

Below are the issues we see most often on kitten tails in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Competition from invasive grasses and weedsThis small plant is easily crowded out by aggressive grasses, non-native annuals, or shrubs. Regular spot weeding around the rosette and — in managed natural areas — periodic prescribed burning in early spring are essential to maintain open habitat.
  • Failure to establish without habitat managementBesseya bullii declines when fire is suppressed and woody vegetation closes in on prairie openings. In garden settings, hand removal of encroaching vegetation each spring mimics the natural disturbance regime this plant depends on.

Propagation

Seed — stratify moist at 4 °C (39 °F) for 60–90 days before spring sowing, or sow outdoors in autumn to allow natural cold stratification. Seed-grown plants may take 2–3 years to reach flowering size. Division is not recommended due to the plant's small size and conservation status. Propagation is the cheapest, most satisfying way to expand a collection — and it doubles as insurance against losing a mature plant to an accident. Take a backup cutting once the parent is established and healthy.

Toxicity to pets

Kitten Tails is mildly toxic to pets. Besseya bullii (Plantaginaceae) is not listed in the ASPCA Toxic and Non-Toxic Plant database, and its phytochemical profile has not been widely studied. Members of this family can contain iridoid glycosides. Given the lack of confirmed safety data, it is classified as mildly toxic as a precaution. Contact a vet if a pet ingests this plant. If you keep cats, dogs, or curious children in the house, weigh placement carefully — a high shelf or a hanging planter is enough for casual safety. For severe ingestion incidents, call your local vet and the ASPCA Animal Poison Control Center (in the US, 888-426-4435).

Pet-safety status is sourced from the ASPCA Toxic and Non-Toxic Plant List, which catalogues the most-asked-about plants for cats, dogs, and horses.

Kitten Tails care — frequently asked questions

What is the common name for Besseya bullii?

Besseya bullii is most commonly called Kitten Tails, but it is also known as Kitten tails, Kittentails, Bull's besseya. The names refer to the same species, so care instructions for Kitten Tails apply identically to anything sold as Kittentails.

How much light does kitten tails need?

Kitten Tails grows best in medium indirect light (a couple of metres from a window). Thrives in dappled sunlight or on north-facing slopes and open woodland edges; can also tolerate full sun in sandy soils that stay cool. Avoid deep shade, which prevents flowering.

How often should I water kitten tails?

Water kitten tails infrequently; dry to medium-dry. Naturally found on dry, sandy, or gravelly prairie and savanna soils; water sparingly after establishment. Moist or poorly drained soils are unsuitable and promote crown rot. The finger-test (or lifting the pot to feel its weight) beats a fixed weekly calendar because pot size, light, and season all change how fast the soil dries.

Is kitten tails toxic to cats and dogs?

Kitten Tails is mildly toxic to pets. Besseya bullii (Plantaginaceae) is not listed in the ASPCA Toxic and Non-Toxic Plant database, and its phytochemical profile has not been widely studied. Members of this family can contain iridoid glycosides. Given the lack of confirmed safety data, it is classified as mildly toxic as a precaution. Contact a vet if a pet ingests this plant.

What USDA hardiness zone does kitten tails grow in?

Kitten Tails is rated for USDA zone 3-5 and RHS hardiness H7. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.

Kitten Tails deep-dive guides

Every aspect of kitten tails care, each with its own calibrated guide:

Featured in these plant shortlists

Kitten Tails qualifies for 7 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

Related guides

Kitten Tails is also known as Kitten tails, Kittentails, and Bull's besseya.