Plants Gone Wild

Plants are one of the most interesting Types to base a deck around because there are so many variants you can choose from. I still remember back when the only plants I used to run were Gigaplant and Lonefire Blossom, both in triplicate. Of course this was two years ago, back when the only competitive Plant-type monster was Lord Poison (which I didn't own at the time). I don't remember the entire build I used but I remember using a lot of Insects to fill in the blanks. I believe it was something like:

3x Doom Dozer.
3x Gigaplant
2x Grasschoper
3x Insect Knight
3x Blazewing Butterfly
3x UFO Turtle
3x Lonefire Blossom

Those where simpler times, months before Synchros and TeleDAD emerged and rocked the meta. Nowadays when you say that you want to run a "Plant Deck" you need to be much more specific. There are a number of methods currently available: 

Debris-Hime: A variant previously considered "dead" when Lonefire Blossom became semi-limited and Black Rose Dragon's limited in September 2009. Now that BRD is off the the list again and with the extra copy of Dandylion available, expect to see the the return of these builds. The deck focuses on clearing the field when necessary and recycling BRD to carry out the job. With your opponent's defenses down, you can control the game with Tytannial's ability to negate most 1-for-1 cards.
Key Cards: 
-Tytannial, Princess of Camellias (run 1)
-Lonefire Blossom (run 2)
-Dandylion (run 2)
-Debris Dragon (run 2-3)
-Black Rose Dragon (run 2-3)

Quick Draw Plants: Considered by many to be the successor to Debris-Hime, this variant takes advantage of the synergy between Dandylion and Quick Draw Synchron to summon Synchron-based Synchro Monsters, most of which were not considered competitive before the deck debuted in March 2010. Be wary, however, you have to devote a good portion of Extra Deck space to monster you can only summon through Quick Draw Synchron.
Key Cards:  
-Dandylion (run 2)
-Quick Draw Synchron (run 2-3)
-Lonefire Blossom (run 2)
-Tytannial, Princess of Camellias (run 1)
-Drill Warrior (run 2-3)
-Nitro Warrior (run 1-2)
-Junk Archer (run 1)
-Junk Destroyer (run 1-2)
-Chevalier de Fleur (run 1-2)

Cherry DAD: More of a DAD variant than a plant deck per se, but an effective one at that. These builds use Cherry Inmato's recruiting power to set up a Dark Armed Dragon play as quickly as possible. Optimally you have a DAD and Ally of Justice Catastor on the field by your second turn, which is an impressive, no doubt. It is prone to dead hands, however, as Inmato itself is pretty useless and drawing multiple copies of "Inmato" Monsters can ruin your combos.
Key Cards: 
-Cherry Inmato (run 2-3)
-Inmato (run 0-2)
-Dark Armed Dragon (run 1)
-Tytannial, Princess of Camellias (run 1-2)
-Dandylion (run 2)
-Lonefire Blossom (run 2)
-Mystic Tomato (run 2)
-Card Trooper (run 1)
-Allure of Darkness (run 1)

Naturias: One the archetype first introduced in the Duel Terminal series, the Naturias are all about control. Plant-based Naturia decks are usually focused on using Naturia Bamboo Shoot to control your opponent. While the TCG exclusive Naturia Pineapple does offer a solid method of getting out BS, at the same time you deprive yourself of the Rock and Insect-type Naturia due to the limitations set on it. Furthermore, BS's ATK stat is quite low for its level and can easily be run over by something as simple as a Cyber Dragon. it is still a viable deck, but you'll need appropriate defensive support.
Key Cards:
-Naturia Bamboo Shoot (run 3)
-Naturia Pineapple (run 2-3)
-Naturia Cherry (run 3)
-Snyffus (run 1)
-Ryko, Lightsworn Hunter (run 2-3)
-Lonefire Blossom (run 2)
-Dandylion (run 2)
-Tytannial, Princess of Camellias (run 1)

GigaVise: One of the few Plant Decks capable of OTKing, its consistently has fluctuated over the past few formats. The focus of this deck is to use a Gigaplant equipped with Supervise to Synchro Summon Power Tool Dragon. If your fortunate enough to pull another Supervise with Power Tool's effect and have a Lonefire Blossom in your hand/Graveyard, you can swarm the field with multiple Synchro Monster including more copies of Power Tool. There's a level of lucky involved if you choose to go the Power Tool Dragon route, but there are alternative Synchros you can use as well, including Black Brutdrago.
Key Cards:
-Gigaplant (run 2-3)
-Lonefire Blossom (run 2)
-Tytannial, Princess of Camellias (run 1)
-Spore (run 1)
-Naturia Cosmobeet (run 1-2)
-Supervise (run 3)
-Mark of the Rose (run 2-3)
-D.D.R. - Different Dimension Reincarnation (run 1-2)
-Power Tool Dragon (run 2-3)
-Black Brutdrago (run 1-2)


Black Garden Control: While this decktype is not my specialty, I do know it takes advantage of the weakened monsters summoned while Black Garden is active. Simply Normal Summoning Cactus Bouncer followed playing Black Garden can put pressure on your opponent. With double MST's floating around this format, you could be leaving yourself vulnerable, however.
Key Cards:
-Black Garden (run 3)
-Cactus Bouncer (run 2-3)
-Lonefire Blossom (run 2)
-Tytannial, Princess of Camellias (run 1)
-Terraforming (run 0-2)

While the number of choices available can be overwhelming, the format is still young. Since much of the support is cross-compatible its possible to hybridize current builds together, such as Debris-Hime and Quick Draw Plants, but that's a matter of personal preference.

Remember players, the game ends with you.

Card Trivia: Did you know that Gigaplant has its art based on a Godzilla series villain, Biollante?