Tricolor oyster plant

Names and identity

Rhoeo spathacea is the older botanical name still printed on the nursery tag. Kew accepts Tradescantia spathacea. Tradescantia Hub's cultivar register lists 'Tricolor' as a synonym of 'Sitara', a useful cross-reference when comparing plant labels.

This rosette-forming houseplant is P32 / #8 / Houseplant-04.

Purchase and label evidence

Purchased at Carlson's Greenhouses on September 20, 2026, in a nursery basket reported as six inches wide. The tag names Carlson's as grower and reads “Rhoeo spathacea Tricolor Basket” and “bright, indirect light”. The purchase price is unrecorded.

Last confirmed floor placement and planned pots

The last recorded location for P31 and P32 is the room-side floor near the money tree, on September 20, 2026. Both nursery pots are reported as six inches wide and full of growth. Two Amazon Basics eight-inch pots with drainage holes are available for repotting; compare the root balls with the new pots before increasing pot size. One pot is decorated, with its plant assignment unrecorded.

The proposed medium is airy, perlite-containing greenhouse potting mix blended with Molly's Succulent Mix; the ratio is undecided. Nursery-pot depth, drainage, existing medium, and root condition still need inspection. The planned repots and living-room move have no completion record.

The equipment inventory lists the Bamworld Nature stools. Their delivery and assembly are unconfirmed.

September 21 living-room plan

The September 22 plan places P31 / #7 Peperomia Bicolor and P32 / #8 Tricolor oyster plant side by side at the north-facing double glass sliding door: P32 closest to the glass, P31 raised on the smallest Bamworld stool, and the FECiDA 54 W six-tube light clipped to a shelf. The smallest stool is seller-listed at 7.8 inches; actual leaf heights and lamp clearances are unmeasured. This is a separate location from the money tree's cactus-room windowsill.

For this layout, try the FECiDA alone for 12 daytime hours first. Two Juhefa three-head fixtures, each seller-rated about 10 W total, are available to fill dim areas if repositioning the six FECiDA heads leaves gaps. A separate Diivoo is optional; its input power is unverified. Installation, settings, and canopy coverage remain unrecorded. See the equipment inventory for exact models and the living-room measurement trial for checking coverage.

Give this plant priority for the stronger measured position while checking both canopies. NC State notes that insufficient light can produce lanky growth and reduced purple coloration. Watch the new central leaves for compact spacing as the light trial progresses.

Origin, publication, and form

Kew records the species as first published in 1788 and native from southern Mexico to Guatemala. The stiff leaves spiral around a short stem, with their broad bases wrapping around it. This close arrangement produces the upright rosette. New rosettes broaden the clump, while small white flowers sit low among the leaves inside boat-shaped bracts.

Care in this collection

Reported room conditions on September 20, 2026 were approximately 45–50% relative humidity and temperatures in the 70s °F. These are approximate observations, not a daily minimum/maximum record. On September 27, the owner confirmed this plant had just been watered at the September 20 pickup. The exact watering time and any nutrients in that water are unknown; that completed nursery watering does not establish present root-ball moisture.

For the proposed living-room trial, 6–8 DLI over a constant 12-hour light period is approximately 139–185 µmol·m⁻²·s⁻¹. A 12-hour daytime trial matches the listed timers on the FECiDA, Juhefas, and optional Diivoo. Align whichever lights are used to the same window; the applied setting is unrecorded. The DLI comparison includes lamps plus daylight, so these PPFD equivalents are not an extra LED quota on top of window light. For the recommended first trial, measure the FECiDA alone after dark at this plant's actual leaf height, then remeasure all selected fixtures together if adding fill. Compare across the foliage, and assess variable daylight separately; a single noon reading multiplied by the timer is not a measured daily integral. Acclimate gradually and judge compact growth and color; neither the starting nor the optional settled range establishes a minimum, optimum, or burn threshold. Measure the living-room conditions separately from the cactus display.

Watch points and propagation

• Inspect leaf bases, undersides, and the basket for pests before integrating it with the established collection.
• Soft bases or persistently wet medium call for root-zone inspection. Dry tips or drooping leaves alone do not distinguish excess light, inconsistent moisture, drafts, or root trouble.
• Avoid leaving water pooled around the crowded leaf bases, and preserve airflow without using a harsh fan stream.
• After the plant establishes, division separates an expanded clump into smaller rooted plants. NC State also lists stem cuttings and seed propagation. Wear gloves when handling cut surfaces because the sap irritates skin.

Sources

• Owner clarification, September 27, 2026: watered at the September 20 pickup, with nursery fertilizer use unreported. The requested Foliage-Pro starting plan distinguishes the historical manufacturer dilution from the collection's gentler frequency; no feed is recorded as completed.

• Iowa State Extension: supplemental-light considerations and University of Minnesota Extension: indoor lighting: generic foliage DLI categories, PPFD conversion, and suggested light duration. The collection's Tricolor ranges remain an inference, not published cultivar thresholds.

• Collection observations and plans, September 21–22, 2026: north-facing living-room layout, P31 stool/P32 glass-side positions, and FECiDA purchase. The equipment record includes the FECiDA, two Juhefas, and optional Diivoo; light ratings are seller specifications, and installation is unconfirmed.

• Collection observations, September 20, 2026: six-inch nursery pots on the room-side floor; two eight-inch Amazon Basics destination pots, one decorated; airy greenhouse mix containing perlite; approximately 45–50% RH and temperatures in the 70s °F. Root condition and nursery feeding history are unrecorded.

• Owner's September 20, 2026 acquisition photograph with Carlson's Greenhouses grower tag and purchase confirmation: exact nursery wording, bright-indirect instruction, purchase date, and purchase basket.

• Kew Plants of the World Online: Tradescantia spathacea: accepted species, native range, and first publication.

• NC State Extension: Tradescantia spathacea: synonyms, growth form, light, upper-mix drying, drainage, propagation, and handling risks.

• University of Florida IFAS: Tradescantia spathacea: clumping growth and white flowers held inside boat-shaped bracts.

• Tradescantia Hub cultivar register: 'Sitara': specialist register's 'Tricolor' synonym cross-reference; retained separately from this plant's nursery provenance.