Lightning+Herb = 9 water crystals
Dark+Herb = 1 deathball
Light+Herb = 6 dark crystals
Wind+Herb = 1 green rock
Dark+Grain = 4 light crystals
Light+Grain = 3 dark crystals
Wind+Grain = 9 earth crystals
Fire+Grain = 9 boxes tarantaru rice
Earth+Grain = 4 boxes tarantaru rice
Water+Grain = 11 pods blue peas
Lightning+Veggie = 2 wild onions
Dark+Veggie = 1 black rock
Herb + Fire Crystal = 5x Ice Crystals
Herb + Dark Crystal = 4x Amaryllis
Herb + Dark Crystal = 1x Screaming Fungi
Vegetable = 4x Rock salt
Vegetable = 2x Yellow stone
Vegetable + Wind Crystal = 1x Rock salt
Vegetable + Wind Crystal = 4x Rock salt
Vegetable + Ice Crystal = 1x Saruta Cotton
Vegetable + Dark Crystal = 3x Light Crystal
Vegetable + Dark Crystal = 4x Light Crystal
Vegetable + Dark Crystal = 1-2x Kuroishi
Grain = 4x Rock salt
Grain = 2,4 or 5x Marguerite
Grain + Ice Crystal = 16x Wind crystal
Grain + Ice Crystal = 8-12 Kukuru bean
Grain + Dark Crystal = 2x Light crystal
Grain + Dark Crystal = 4x Coral Bamboo
Grain + Dark Crystal = 8x Taru taru rice
Fruit = 1x Indigo stone.
herb seeds + wind crystal = 6 sprigs of sage
herb seeds + earth crystal= 6 Tarutaru rice
herb seeds + fire crystal = 20 bunches Kazham peppers Herb = 10x Carnation
Herb + Dark crystal = 3-4x Light crystal
Herb + Dark Crystal = 1x Deathball
Herb + Dark Crystal = 1x Screaming Fungi
Vegetable = 1x Rock salt
Vegetable = 2x Yellow stone
Vegetable = 3-4x Lilac
Vegetable + Wind Crystal = 2-3x Rock salt
Vegetable + Wind Crystal = 8-12 Ghesyel Grass
Grain = 1x Akaishi
Grain = 3-4x Rock salt
Grain = 1x Puffball
Grain = 2 or 5x Marguerite
Grain + Fire Crystal = 4x Ice crystal
Grain + Fire Crystal = 10-11x Taru taru rice
Grain + Earth Crystal = 4x Lightning crystal
Grain + Earth Crystal = 7-9x Taru taru rice
Grain + Water Crystal = 12x Blue piece
Grain + Ice Crystal = 8 or 12x Wind crystal
Grain + Ice Crystal = 8-12x Kukuru bean
Grain + Light Crystal = 11x Sunflower seeds
Grain + Dark Crystal = 2-4x Light crystal
Grain + Dark Crystal = 1-2, 4x Coral bamboo
Grain + Dark Crystal = 8-9, 13x Taru taru rice
Fruit = 1x Indigo Stone
Fruit + Fire Crystal + Fire Crystal = 3x Ice crystal
Fruit + Earth Crystal + Fire Crystal = 12x Sandoria Mosquito lot
Fruit + Earth Crystal + Dark Crystal = 5x Lightning Crystal

Ceramic Flower Pot

Herb = 8x Carnation
Herb + Fire Crystal = 21x Kazham Peppers
Herb + Ice Crystal = 5x Duck Meal
Herb + Dark Crystal = 1x Deathball
Herb + Lightning Crystal = 19 Water Crystals (lightning day harvest)
Vegetable = 2x Rock salt
Vegetable + Wind Crystal = 4x Rock salt
Vegetable + Wind Crystal = 8 or 12x Ghesyal Grass
Vegetable + Ice Crystal = 2x Saruta Cotton
Vegetable + Dark Crystal = 3x Light Crystal
Grain = 1x Rock salt
Grain = 1x Puff ball
Grain = 3x Marguerite
Grain + Fire Crystal = 3x Ice crystal
Grain + Earth Crystal = 7 or 9x Taru taru rice
Grain + Ice Crystal = 9x Wind Crystal
Grain + Ice Crystal = 8-12x Kukuru bean
Grain + Dark Crystal = 4x Light Crystal
Grain + Dark Crystal = 1x Coral Bamboo
Grain + Dark Crystal = 11x Taru taru rice
Fruit = 4x Rock salt

Earthen Flower Pot

Herb = 1x Rock salt
Herb + Darkness = 2-4x Light Crystal
Herb + Dark Crystal = 1x Death ball
Vegetable = 1 or 4x Rock salt
Vegetable + Wind Crystal = 2-3x Rock salt
Vegetable + Wind Crystal = 8, 11-12x Ghesyal Grass
Vegetable + Ice Crystal = 3x Saruta Cotton
Vegetable + Dark Crystal =2x Kuroishi
Grain = 1-2x Rock salt
Grain = 1x Puff ball
Grain = 2 or 4x Marguerite
Grain + Earth Crystal = 5 Frost Turnips
Grain + Wind Crystal = 10x Millioncorn
Grain + Wind Crystal = 11 millioncorn (earthday)
Grain + Ice Crystal = 11-12x Wind crystal
Grain + Ice Crystal = 17-20x Kukuru bean
Grain + Dark Crystal = 3x Light crystal
Grain + Dark Crystal = 12x Taru taru rice

To start gardening you need to purchase a flower pot which can also be made if you have the 2 trade skills goldsmithing and blacksmithing. Would be much easier to purchase it however. Flower pots can cost about 1,000 gil. Money makes money, in this case, gils makes gils. This is an investment of time and gils. After getting your pot, you will need some seeds which drops off various sapling type mobs or can be purchased at some merchants.

Place your pot in your Mog safe and use the furniture option to situate the flowerpot somewhere in your house. You can have up to 6 flower pots in each Mog house. Ideally, the more characters the better. After placing the pot, go to the garden option in the Mog house menu and plant the seed into the pot. A garden doesn’t grow over night, in real life it takes weeks to months. Lucky for us it will only take a few days in the game. Once your plant begins to germinate you will need to feed it special crystals(Whatever happened to old fashion water?). The crystals are the same ones used for the guilds and drop when you have signet cast upon you by a guard. This will generally take a few days, be sure to check back on your plant every chance you get. The better you treat your plant the better your results. If you should choose to completely neglect your plant it may die. Just like in real life.

The result seems to depend upon a combination of the crystal you fed the plant and the original seed. I have not seen any accurate chart on how it works, so it may even be somewhat random. It seems as though you get the opposite of the crystal you feed the plant. Thus feeding it dark crystals will bring you light ones or fire will bring water. However, you can also get various plants, herbs and other things that could conceivably grow in the dirt. Many of these items sell for decent Gil.

Try this

Buy a brass flower pot in the auction house, several vegetable seeds and some water crystals. You plant the flower pot in your Mog house, and put in the vegetable seeds. You feed it water crystals now and then, and after 1-3 days you will have 17 fire crystals come out of it! I have heard rumors that you won’t always get fire crystals, but you can have I think 6-8 flower pots per house, so if you use an auction mule to garden as well, you can make some really good money… 20-30k every 2-3 days for each account, minus the cost of the seeds and the water crystals. Also, I think that all gardening combinations yield something that can be sold, so you may find a combination that gives something even better than fire crystals! Just experiment! A flower pot is a very cheap investment, and if you are disappointed with the result, you’re not losing much money anyway!