This edible plant list was originally written by the late Jane Nicoll and was updated/amended in March 07 by Martin Dann. Jane spent many hours observing the plants and flowers that her tortoises ate by choice. Although this plant list was originally written for horsfields, it applies to tortoises in general.
EDIBLE AND NON EDIBLE GARDEN PLANTS AND FLOWERS FOR TORTOISES
To ensure a balance please grow as many different varieties as you can, and use to supplement weeds and wild flowers., which should, if possible, form the main part of your tortoise’s diet.
GARDEN PLANTS
Agave
Aloe vera
Anagallis Linifolia - (annual) leaves & flowers
Antirrhinum - leaves & flowers
Ameria (thrift ) - flowers
Aubretia - leaves & flowers
Begonia Semperflorens - flowers & leaves (avoid all tuberous begonias however, as may be toxic)
Cactus, opuntia (Prickly pear/Indian fig) - spineless or semi spineless varieties easier to handle
Calendula officinal - flowers
Campanula - especially C. carpatica
Coreopsis - flowers
Cornflower - leaves of young plants nibbled
Crassula
Dead Nettle (Lamium) - leaves
Echeveria
Eschscholzia (californian poppy) - flowers
Fuchsia - leaves & flowers eaten occasionally
Gazania - flowers & leaves
Geranium species (perennial) leaves & flowers
Hebe - flowers (leaves may be nibbled)*
Hemerocallis - (day lily) flowers
Hibiscus - flowers especially, also leaves
Honeysuckle - flowers
Hosta - leaves
Hottentot Fig (Carpobrotus edulis) - leaves
Lavatera - (Mallow) - leaves & flowers
Mesembryantemums (annual) - leaves & flowers
Malva - (Mallow) leaves & flowers
Meconopsis Cambrica (Welsh Poppy) - leaves & flowers
Mimulus (annual) - especially flowers
Mysotis (forget-me-nots) - leaves & flowers
Mulberry (Morus alba) - leaves
Nasturtium - leaves & flowers
Nemesia - leaves & occasionally flowers
Osteospermum - flowers & leaves eaten occasionally
Pansies - leaves and flowers
Pelargonium - leaves & flowers
Petunia - leaves & flowers
Rose - petals only
Sedum spectabilis - leaves (other pink flowered alpines sedums are also consumed)
Sempervivum (house leeks) - leaves
Strawberry (wild and cultivated) - leaves & flowers. Give fruit only as treat or to disguise medicine
Sweet Woodruff (galium odoratum)*
Viola/Violet - leaves & flowers
Zinnia - leaves & flowers
* Dwarf or small hebes are ideal for tortoise garden planting providing both dapples shade and the occasional nibble. Sweet woodruff is more useful as a low growing evergreen shelter plant, but is occasionally eaten. In general, tortoises do not eat herbs but will use them for shelter. Rosemary, thyme, sage, wild marjoram and bay can all be used in tortoise enclosures.
POISONOUS PLANTS
Keepers can be very worried about tortoises eating poisonous plants. In reality, the risk is small as tortoises will naturally avoid them.. However, occasional cases of poisoning, even death, have been recorded through accidental ingestion of some garden plants, and it is therefore best to exclude these from tortoise habitats, or at the very least ensure they are nor grown in close proximity to edible plants and weeds. Another thing to take into consideration is that plants straight from the nursery or garden centre may have been treated with chemicals, and should therefore not be fed to tortoises until after few months of natural weathering.
As a guide, common plants to be avoided include: Daffodils and Narcissi, Hellebores, Hypericum-(often called Rose of Sharon, not to be confused with the Hibiscus variety Rose of Sharon which is quite edible), Hydrangea, Convallaria (lily of the valley), Euphorbias, Digitalis (foxglove), Monkshood (Aconitum) Nicotiana (tobacco plant), Rhododendrons & Azaleas, Ragwort (senico), Crocus, Dicentra (bleeding heart), Lupin (Lupinus), Vinca (periwinkle), Paeony (paeonia), Rhubarb, Misletoe and Lobelia. In general plants which grow from bulbs, tubers & corms should be excluded as many, although not all, are potentially toxic. Conifers which produce needles or pine cones should also be avoided.
However, if you see your tort nibbling a few leaves of, for example, sweet peas or impatiens (busy lizzies), don't panic. Many plants which are often listed as toxic are, it would appear, safe when taken in small amounts as part of a varied diet.