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Reptiles & Amphibians

What Flowers Can Tortoises Eat? A Safe and Unsafe List

Hibiscus, dandelion, nasturtium and rose are all safe and popular. The flowers that are genuinely toxic, and why variety matters more than any one.

By Zakaria 4 min read Save to Pinterest — opens Pinterest in a new tab
A leopard tortoise in rough grass with a pale hibiscus flower held in its mouth
Photo: Bernard DUPONT from FRANCE, CC BY-SA 2.0, via Wikimedia Commons
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Hibiscus and dandelion are the two worth actually growing. Beyond that, the useful rule is variety over optimisation — fifteen mediocre plants beat one perfect one.

Safe, and worth growing

The flowers to feed
FlowerNotes
HibiscusFlowers and leaves. A favourite, easy to grow
DandelionFlower, leaf and stem. Excellent Ca:P ratio
NasturtiumFlowers and leaves, peppery, readily eaten
Rose petalsSafe. Untreated bushes only
Pansy, violaSafe, easy, flowers for months
Hollyhock, mallowExcellent — flowers and leaves both
Calendula (pot marigold)Safe. Not French/African marigold
Chicory, clover, plantainStaples rather than treats
Sow thistleRelished; wear gloves picking it
Evening primroseSafe
Honeysuckle flowersFlowers only — not the berries
Geranium (Pelargonium)Safe in moderation
Herb flowers — basil, oregano, thymeSafe

Toxic — keep out of the enclosure

Do not plant these where a tortoise grazes
Plant
Daffodil and all narcissusBulbs especially
FoxgloveCardiac glycosides
Lily of the valleyHighly toxic
OleanderSeverely toxic
Azalea, rhododendronGrayanotoxins
ButtercupIrritant
HelleboreToxic
Lupin, delphinium, monkshoodToxic
Hyacinth, iris, tulip bulbsToxic
Wisteria, laburnumToxic
Nightshades — tomato, potato, aubergine flowersSolanine
Ivy, avocadoToxic

Remove the plant, do not rely on the tortoise

A grazing tortoise samples whatever is in reach, and a plant that is safe once it is desiccated and mixed into hay is not safe as a fresh shoot at head height.

The enclosure is the control. Anything on the toxic list comes out of it entirely.

Where the flowers come from matters

  • Never florist or supermarket flowers. Systemic pesticides, growth regulators and preservatives, none of which wash off, and often an unclear species
  • Garden centre plants need repotting into fresh compost and growing on for several months before anything is fed from them — neonicotinoid treatments persist in the tissue
  • Foraged weeds need to come from ground with no herbicide or pesticide, away from roadsides, and away from anywhere dogs are walked
  • Grow your own from seed where you can. It is why most keepers end up with a scruffy weed patch in a corner, and it is the right answer

Where flowers sit in the diet

Proportions, Mediterranean species
ShareExamples
High-fibre weeds and greens~70%Dandelion, plantain, clover, sow thistle, mallow
Flowers~20%Hibiscus, nasturtium, viola, calendula
Dried grasses and hayAlways availableTimothy, meadow hay
FruitRarely or neverMediterranean species do not need it
CalciumAlways availableCuttlebone, calcium powder

Tropical species differ. Redfoots and yellowfoots take more fruit and some animal protein, and sulcatas are grazers that want grass and hay above nearly everything else. Check your own species before applying any of this.

Too much soft, sweet food causes pyramiding

Rapid growth from a diet too rich and too low in fibre produces raised, lumpy scutes — and pyramiding does not reverse.

Fibre, calcium, hydration and UVB are the four things that prevent it. Flowers are a pleasure, not a foundation.

Planting the enclosure

Plant for food, cover and shade at once:

  • Grazing layer: clover, plantain, dandelion, chicory, lawn daisies
  • Flowering layer: hollyhock, mallow, nasturtium, calendula, viola
  • Structure: hibiscus, lavender, rosemary, thyme — mostly left alone, and useful shelter
  • Mixed height, so there is shade and hiding as well as browse
  • No bark chips — an ingestion risk
  • No slug pellets, herbicide or pesticide, anywhere in the enclosure
  • Overplant. A tortoise grazes harder than you expect, and a sparse enclosure gets stripped

A planted enclosure feeds the animal, shelters it, and gives it something to do — which is worth as much as the nutrition.

Common questions

What flowers are safe for tortoises to eat?

Hibiscus, dandelion, nasturtium, rose petals, pansy and viola, hollyhock, mallow, calendula, chicory, clover, plantain, sow thistle, evening primrose and honeysuckle flowers are all widely fed and well tolerated. Hibiscus and dandelion are the two most useful, because both are relished and both are easy to grow in quantity. The flowers of most edible garden herbs are safe too. What matters as much as the list is variety — a tortoise eating fifteen different things does far better than one eating the single best item.

Can tortoises eat dandelions?

Yes, and they are close to an ideal food — flowers, leaves and stems are all edible, the calcium to phosphorus ratio is favourable, and the fibre content suits a grazing reptile's gut. Feed them alongside other weeds rather than exclusively, since dandelions are mildly diuretic in quantity and a varied diet is the point. Pick from ground that has not been treated with herbicide or pesticide, away from roadsides, and away from anywhere dogs are walked.

What flowers are toxic to tortoises?

Daffodil, foxglove, lily of the valley, oleander, azalea and rhododendron, buttercup, hellebore, lupin, delphinium, hyacinth, iris, wisteria, and the flowers of any nightshade including tomato and potato, are all genuinely toxic and should be kept out of an enclosure entirely. Avocado and ivy belong on the same list. Because a grazing tortoise samples whatever is within reach, the practical approach is removing the plant from the enclosure rather than relying on the animal to avoid it.

Can tortoises eat flowers from the florist or supermarket?

No. Cut flowers are routinely treated with systemic pesticides, growth regulators and preservatives that do not wash off, and the species is often unclear. The same caution applies to garden centre plants, which should be repotted into fresh compost and grown on for several months before anything is fed from them. Grow your own from seed, or pick from untreated ground you know, which is the reason most keepers end up with a weed patch somewhere.

How much of a tortoise's diet should be flowers?

Flowers are part of the mix rather than the basis of it. For Mediterranean species such as Hermann's, spur-thighed and marginated tortoises, the diet should be mostly high-fibre weeds and leafy greens — dandelion, plantain, clover, sow thistle, mallow — with flowers making up perhaps a fifth of it. Tropical species like redfoots take more fruit and some animal protein. Too much of anything sweet or soft produces rapid shell growth and pyramiding, which does not reverse.

Which flowers can I plant in a tortoise enclosure?

Plant things that are safe, tough enough to be grazed and walked on, and useful as cover. Hibiscus, hollyhock, mallow, nasturtium, calendula, viola, clover, chicory, plantain and dandelion all qualify, and lavender, rosemary and thyme work well as structure the tortoise will mostly leave alone. Aim for mixed height so there is shade and hiding as well as food, and do not lay bark chips or use slug pellets anywhere in the enclosure.

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