Nasturtium

Leopard Tortoise

Stigmochelys pardalis

No direct source lists nasturtium for Leopard Tortoises, but Tortoise Table moderate rating and nutritional profile (2:1 Ca:P, low sugar) support occasional use. Leopard Tortoises are flagged by Tortoise Trust as vulnerable to goitrogens, so the mustard-oil isothiocyanate content in nasturtium warrants moderation.

Greek Tortoise

Testudo graeca

Tortoise Table rates nasturtium as moderate. Greek Tortoises (T. graeca) are listed by Tortoise Trust as particularly vulnerable to goitrogenic compounds; while nasturtium is not a classic goitrogen, its mustard-oil glycosides (isothiocyanates) share structural similarities, warranting extra caution for this species. Feed sparingly as part of a varied diet.

Sulcata Tortoise

Centrochelys sulcata

ReptiFiles explicitly lists nasturtium as safe for Sulcata Tortoises. No fruit concern applies here as nasturtium is a flower/leaf. Sulcata's diet should remain grass-heavy, so nasturtium serves as an enrichment food only.

Eastern Box Turtle

Terrapene carolina

ReptiFiles confirms Eastern Box Turtles are omnivores with a significant plant component. Nasturtium is nutritionally appropriate as a leafy variety food with a 2:1 Ca:P ratio and low sugar. No toxicity concerns are identified for this species in any consulted source.

Red-footed Tortoise

Chelonoidis carbonarius

Nasturtium is a leafy flower well within the 60% leafy green component of a Red-footed Tortoise's omnivore diet. Tortoise Table moderate rating and acceptable Ca:P ratio of 2:1 support regular but varied use. No toxicity concerns identified for this species.

Red-eared Slider

Trachemys scripta elegans

ReptiFiles lists dandelion and leafy greens as core vegetable items for Red-eared Sliders; nasturtium is nutritionally comparable with a favorable 2:1 Ca:P ratio and low protein. Tortoise Trust notes aquatic plants and salad greens are freely available for sliders, supporting nasturtium as a safe occasional leafy addition.

Yellow-bellied Slider

Trachemys scripta scripta

Yellow-bellied Sliders share the same dietary pattern as Red-eared Sliders per ReptiFiles and Tortoise Trust guidelines. Nasturtium's 2:1 Ca:P ratio and low sugar content make it a suitable leafy variety item within the 75% vegetable portion for adult individuals.

Russian Tortoise

Agrionemys horsfieldii

ReptiFiles explicitly lists nasturtium as safe for Russian Tortoises. Ca:P ratio of 2:1 meets the minimum target and protein at 2.3g/100g is within the acceptable 2–6% wet basis range per Tortoise Trust. Feed as variety food rather than staple due to peppery glucosinolate-like compounds.

Painted Turtle

Chrysemys picta

Tortoise Trust confirms aquatic plants and salad greens are appropriate for painted turtles. Nasturtium's favorable Ca:P ratio of 2:1 and low protein make it a suitable plant matter addition for adults, whose diet shifts toward a higher proportion of vegetation over time.

Hermann's Tortoise

Testudo hermanni

Tortoise Table rates nasturtium as moderate for tortoises generally, supporting occasional feeding. The 2:1 Ca:P ratio is nutritionally acceptable for Mediterranean species, and the low sugar content poses no concern for this herbivore.