Can Hermann's Tortoises eat Sow Thistle?
Sonchus oleraceus
Safety verdict
Caution
Why
[confidence: high] [source: The Tortoise Table plant database (theTortoiseTable.org.uk) and exotic reptile vet review specializing in chelonian nutrition] Sow Thistle (Sonchus spp.) is generally considered a suitable and commonly consumed wild plant for Hermann's Tortoises, but it contains moderate oxalic acid levels which can interfere with calcium absorption if fed in excess. It should be offered as part of a varied diet rather than as a dietary staple.
How much / how often
Offer 2-3 times per week at most, mixed with other low-oxalate weeds and leafy greens to balance nutritional intake.
Preparation
Harvest from areas free of pesticides, herbicides, and pollution. Rinse thoroughly before feeding. Both leaves and flowers can be offered.
Nutrition (per 100 g)
64 mg
Calcium
44 mg
Phosphorus
1.5:1
Ca:P ratio
low
Oxalate
2.1 g
Protein
2.2 g
Fiber
Reviewed by admin on May 2026