-1 Tytannial, Princess of Camellias
-1 Gigaplant
-3 Mystic Tomato
-1 DaD
-1 Cosmobeet
-2 MST
-3 Seed Cannon
-3 Fragrance Storm
-2 Super Solar Nutrient
-3 Wall of Thorns
-1 Pollinosis
-2 Divine Wrath
-1 Call of the Haunted
+1 Spore
+1 Effect Veiler
+2 Botanical Lion
+1 Twilight Rose Knight
+1 Grow Up Bulb
+2 Dandylion
+1 Mark of the Rose
+1 Dark Hole
+2 Book of Moon
+2 Miracle Fertilizer
+1 Monster Reborn
+1 Torrential Tribute
+1 Dimensional Prison
+1 Mirror Force
Ok. So, I'm gonna try and explain this all.
Your Monster lineup is alright, but it has a lot of cards that don't need to be there, and quantities that are higher then they could be. Tomato + DaD isn't really a good combo, because there's so much that could go wrong, and Tytannial + Gigaplant aren't even needed, besides being beatsticks. Cosmobeet looked like it was just thrown in there as well. I added some tuners, and 2 Botanical Lion, because you seemed to be going for the tranditional Plant beatdown, which I completely respect as a solid decktype. Twilight Rose Knight is really your choice.
For spells, you had some really odd set up that I disliked for the build. MSTs are good, but putting them in side won't hurt, especially that it's a one for one card. MotR is a great choice in any plant deck, but two will make it much more consistent. Super Solar Nutrient can work, but three is way too many. Seed Cannons are just plain bad. Don't use them. And also, 3 Fragrance Storm is pretty odd as well. So, I put in some staples that you missed like Dark Hole, Monster Reborn, etc. and Book of Moon. I also threw in Miracle Fertilizer, because it's a pretty solid card.
Finally, traps. Your lineup was alright, but there were some errors. First of all, WoT are completely unnecessary and lives in Mirror Force/DPrison's shadow, especially with three crowding up your deck! Pollinosis is a good card for Plants as it gets them in the grave, and so 2 is an alright amount, but 3 is a little bit overdoing it. Divine Wrath dosen't really help here, but it's srt of personal preference. I added some staples you missed yet again (Mirror Force and Dimensional Prison) as well.
So there you have it. I tried to be as discreet as possible. There's a good chance when you apply my edits that you won't have 40 cards, so I'm gonna go ahead and say that you can add whatever, and then put it up for someone to rate, simple as that. I hope I helped.