Alchemy 

List of Approximate Materials Required for 1-450:

• 59 x Peacebloom
• 59 x Silverleaf
• 80 x Briarthorn
• 30 x Bruiseweed
• 15 x Mageroyal
• 40 x Stranglekelp
• 30 x Liferoot
• 30 x Kingsblood
• 45 x Goldthorn
• 5 x Wild Steelbloom
• 70 x Sungrass
• 15 x Khadgar's Whisker
• 20 x Arthas' Tears
• 40 x Blindweed
• 75 x Golden Sansam
• 40 x Mountain Silversage
• 38 x Felweed
• 20 x Ragveil
• 101 x Dreaming Glory
• 10 x Netherbloom
• 40 x Nightmare Vine
• 20 Talandra's Rose
• 70 Goldclover
• 41 Tiger Lily
• 24 Adder's Tongue
• 10 Icethorn
• 40 Lichbloom
• 10 Dark Jade
• 10 Huge Citrine
• 10 Eternal Fire

Vials

• 74 x Empty Vial
• 65 x Leaded Vial
• 100 x Crystal Vial
• 170 x Imbued Vial

First, visit any trainer in the main cities of old Azeroth - train Apprentice Alchemy.

• 1-60
  59 x [Minor Healing Potions] - 59 Peacebloom, 59 Sliverleaf, 59 Empty Vial

  Keep these as you will need them later on.

60 - 140

Train Alchemy Journeyman.

• 60 - 110
  50 x [Lesser Healing Potion] - 50 Minor Healing Potion, 50 Briarthorn

• 110 - 140
  30 x [Healing Potion] - 30 Bruiseweed, 30 Briarthorn, 30 Leaded Vial

140 - 210

Train Alchemy Expert.

• 140 - 155
  15 x [Lesser Mana Potion] - 15 Mageroyal, 15 Stranglekelp, 15 Empty Vial

• 155 - 185
  30 x [Greater Healing Potion] - 30 Liferoot, 30 Kingsblood, 30 Leaded Vial

• 185 - 210
  25 x [Elixir of Agility] - 25 Stranglekelp, 25 Goldthorn, 25 Leaded Vial

210 - 285

Train Alchemy Artisan.

• 210 - 215
  5 x [Elixir of Greater Defence] - 5 Steelbloom, 5 Goldthorn, 5 Leaded Vial

• 215 - 230
  15 x [Superior Healing Potion] - 15 Sungrass, 15 Khadgar's Whisker, 15 Crystal Vial

• 230 - 250
  20 x [Elixir of Detect Undead] - 20 Arthas' Tears, 20 Crystal Vial

• 250 - 265
  15 x [Elixir of Greater Agility] - 15 Sungrass, 15 Goldthorn, 15 Crystal Vial

• 265 - 285
  20 x [Superior Mana Potion] - 40 Sungrass, 40 Blindweed, 20 Crystal Vial

285 - 360

Go to Outland and train Alchemy Master.

• 285 - 300
  20 x [Major Healing Potion] - 40 Golden Sansam, 20 Mountain Silversage, 20 Crystal vial

• 300-310
  10 x [Volatile Healing Potion] - 10 Golden Sansam, 10 Felweed, 10 Imbued Vial

• 310-325
  15 x [Elixir of Healing Power] - 15 Golden Sansam, 15 Dreaming Glory, 15 Imbued Vial

Specialization Time!

Once you obtain an Alchemy skill of 325 and also level 68, you will begin a quest to learn one of three specializations of your choice: Potions, Elixirs or Transmutations.

• 325-335
  10 x [Mad Alchemists's Potion] - 20 Ragveil, 10 Crystal Vial

• 335-340
  5 x [Super Healing Potion] - 10 Netherbloom, 5 Felweed, 5 Imbued Vial

• 340-360
  23 x [Super Mana Potion] - 46 Dreaming Glory, 23 Felweed, 23 Imbued Vial

360 - 450

Go to Nothrend and train Alchemy Grand Master.

• 360 - 365
  5 x [Icy Mana Potion] - 10 Talandra's Rose, 5 Imbued Vial

• 365 - 380
  17 x [Spellpower Elixir] - 17 Goldclover, 17 Tiger Lily, 17 Imbued Vial

• 380 - 385
  5 x [Potion of Nightmares] - 5 Goldclover, 10 Talandra's Rose, 5 Imbued Vial

• 385 - 395
  12 x [Elixir of Mighty Strength] - 24 Tiger Lily, 12 Imbued Vial

• 395 - 405

  Good news! When you reach 400, you can make a [Northrend Alchemy Research] and your Alchemy Trinket, so you will need to craft fewer potions.

  12 x [Elixir of Mighty Agility] - 24 Goldcover, 24 Adder's Tongue, 12 Imbued Vial

• 405 - 410
  5 x [Runic Healing Potion] - 5 Goldcover, 10 Icethorn, 5 Imbued Vial

• 410 - 425

  This recipe turns green at 422, so you might need to make more then 20.

  20 x [Runic Mana Potion] - 20 Goldcover, 40 Lichbloom, 15 Imbued Vial

• 425 - 435

  10 x [Transmute: Earthsiege Diamond] - 10 Dark Jade, 10 Huge Citrine, 10 Eternal Fire

• 435-450
  Here is the thing, there is no point in leveling your alchemy further then 435 due to the fact that you can make every Flask at 435. At the moment there is only 1 recipe that requires 445 skill, and thats [Transmute: Eternal Might].