Gigavise Mentioned
Turbo out a Gigaplant or 2 to swarm the board with plants! Equip a Supervise to a Gigaplant to enable its effects! Lonefire Blossom can special summon a Gigaplant from your deck and Miracle Fertilizer can revive them from your graveyard! Super Solar Nutrient can search for a Lonefire Blossom by tributing a level 2 or lower plant monster you control!
Plant Tech
Copy Plant and Nettles are the tuners of choice for this deck because they're both plants, so you can easily special summon them with Lonefire Blossom, Gigaplant, and Miracle Fertilizer. Nettles allows instant access to level 6 and 8 synchros. Copy Plant can copy the level of any plant monster on the field for flexible synchros. It's a great effect that allows you synchro summon a level 7 monster without using your Gigaplant if you already have a Dandylion token on the field. One of the best level 7 monsters to summon is Power Tool Dragon, because it can search for your equip spells.
Tytannial, Princess of Camellias is one of the most powerful plants you can summon off of a Lonefire Blossom because her effect could tribute a plant to negate and destroy any card effect that targets a card(s) on the field. This effect could stop a lot of cards that target in this format, such as Dimensional Prison, Blackwing - Gale the Whirlwind, Mystical Space Typhoon, and Icarus Attack, and it makes her almost unstoppable when paired with a Stardust Dragon for its protection against card effect destruction.
Dandylion is an auto-inclusion in almost every plant strategy because it easily generates tokens if it's sent to the graveyard. Foolish Burial will trigger its effect.
Botanical Lion and Lord Poison are searchable plant beaters that can be searched with Super Solar Nutrient. Botanical Lion pressures the opponent with brute force. Lord Poison is for when you'd need a gentler touch. Lord Poison could also be searched off of Sangan's effect in case you need to beat an opponent's Fossil Dyna Pachycephalo.