The maximum cap for your professions in Mists of Pandaria will be 600 (up from 525 as in Cataclysm).
For the Mining Guide click here.
All of the herbs below require Inscription skill of 500 to be milled into inks.
Zen Master Herbalist requires Level 80 and 48 Gold to purchase (though I am at Revered with Orgrimmar so the cost may be 50G)
Green Tea Leaf is used to brew the spirit flask and it can be found mainly in Jade Forest, Valley of the Four Winds, Krasarang Wilds and Kun-Lai Summit.
Rain Poppy is used to create the stamina flask for tanks, elixirs, potions and can be found in waters of Jade Forest.
Silkweed can be found in waters of Valley of the Four Winds. It's used to create the intellect flask and other potions and elixirs.
Snow Lily is used by alchemists to create the agility flask and can be found in all snow-covered areas of Kun-Lai Summit as well as in Sha-touched Herbs, which is an equivalent to the Frozen Herb of Wrath (WoTLK)
Fool's Cap is used to brew the strength flask and it can be found on the east side of Windless Isle (Level 90 Daily Quest Hub Zone)
Golden Lotus - In Cataclysm, the mandatory ingredients for flasks were mainly volatiles, but in MoP, all flasks once again require a lotus as it was in Wrath of the Lich King. Imagine this herb as an equivalent to Wrath's Frost Lotus. It spawns in most zones of Pandaria, as it's a rare spawn node for other herbs.