I'd feed coriander every day but I like to rotate and give different herbs and vegs. Stems are also edible and rabbits eat them with great appetite, just wash them well. When I give mint I give 2-3 full stems with leaves per rabbit, same with coriander. My rabbits also like thyme and fennel, well they like almost all fresh herbs. Every herb actually has it's medicinal meaning so you can also give some mint to help with digestion, I give chamomile and thyme to boost immunitet I give sage as a strong antibacterial etc.
Here's some more information on what you could feed your rabbit
LIST OF POSSIBLE FOODS TO FEED
NOTE: It is always preferable to buy organic produce if at all possible. If collecting wild foods such as dandelion greens, make sure they are from a pesticide-free area. All fresh foods regardless of the source should be washed or scrubbed (in the case of hard vegetables) before serving them to your rabbit.
LEAFY GREENS
These foods should make up about 75% of the fresh portion of your rabbit’s diet (about 1 packed cup per 2 lbs of body weight per day).
Leafy Greens I (need to be rotated due to oxalic acid content and only 1 out of three varieties of greens a day should be from this list)
Parsley
Spinach
Mustard greens
Beet greens
Swiss chard
Radish tops
Sprouts (from 1 to 6 days after sprouting, sprouts have higher levels of alkaloids)
Leafy Greens II (low in oxalic acid)
Arugula
Carrot tops
Cucumber leaves
Endive
Ecarole
Frisee Lettuce
Kale (all types)
Mache
Red or green lettuce
Romaine lettuce
Spring greens
Turnip greens
Dandelion greens
Mint (any variety)
Basil (any variety)
Watercress
Wheatgrass
Chicory
Raspberry leaves
Cilantro
Radicchio
Bok Choy
Fennel (the leafy tops as well as the base)
Borage leaves
Dill leaves
Yu choy
NON-LEAFY VEGETABLES
These should be no more than about 15 % of the diet (About 1 tablespoon per 2 lbs of body weight per day).
Carrots
Broccoli (leaves and stems)
Edible flowers (roses, nasturtiums, pansies, hibiscus)
Celery
Bell peppers (any color)
Chinese pea pods (the flat kind without large peas)
Brussel sprouts
Cabbage (any type)
Broccolini
Summer squash
Zucchini squash
FRUITS
These should be no more than 10% of the diet (about 1 teaspoon per 2 lbs of body weight per day). NOTE: unless otherwise stated it is more nutritious to leave the skin on the fruit (particularly if organic), just wash thoroughly. IF you are in doubt about the source of the fruit and you are concerned about chemicals in the skin, then remove it.
Apple (any variety, without stem and seeds)
Cherries (any variety, without the pits)
Pear
Peach
Plum (without the pits)
Kiwi
Papaya
Mango
Berries (any type)
Berries (uncooked)
Pineapple (remove skin)
Banana (remove peel; no more than about 2 1/8 inch slices a day for a 5 lb rabbit…they LOVE this!)
Melons (any – can include peel and seeds)
Star Fruit
Apricot
Currants
Nectarine
Please note that there is currently dispute within the scientific community regarding the levels of oxalates and goitrogens in kale. Many of our rescuers have fed kale daily, combined with other veggies, with no ill effects. Others have found that kale fed in large amounts on a daily basis may contribute to bladder sludge and other health issues. HRS encourages you to make your own decisions on how you feed kale to your rabbit based on this information, and when solid, undisputed research is found we will update this and other articles relating to feeding kale.
https://rabbit.org/suggested-vegetables-and-fruits-for-a-rabbit-diet/