They get the same diet I recomment to other people.
70-80% calcium rich greens: Collards, mustard greens, turnip greens, dandelions, arugula, watercress are the better ones. Kale, beet greens, chicory greens and escarole used in combination with the better greens are also good. Stay away from lettuces (except for a very occasional treat) because they have very very little nutrition if at all and the iguana will fill up on it and not eat the nutritional food--in other words it is junk food. Spinach should only be used occasionally because it is way too high in oxalates and phosphorous. The oxalates bind with the calcium making it indigestible and the phosphorous binds with calcium in the blood making the calcium there useless. But spinach is high in iron so it is good if only used very occasionally (1-2x a month maybe).
20-30% vegetables: Winter squash (acorn, butternut, kabocha, ect..), green beans, snap peas, okra, parsnip, yucca root. Summer squash (zucchini, yellow, Mexican or white, ect...) occasionally is good too. Red, yellow, and orange bell peppers are good color enhancers.
No more than 10% fruit: Blueberries, figs, mango, papaya, and prickly pear (cactus) are the better fruits. Strawberries, raspberries, black berries and melons are good. Flowers should be considered a fruit
I use 5-7 greens. Collards, turnip greens, mustard and dandelions greens are my main greens. Then I use escarole, endive, watercress, hibiscus leaves, kale, spinach (very occassionally), romaine (very occassionally).
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Marie
Poyner Corner