Learnt by Level Up

These Pokémon learn Leech Seed at the level specified

Name ⇧⇩	Level ⇧⇩	Type ⇧⇩
Bulbasaur	7	grass poison
Ivysaur	1	grass poison
Venusaur	1	grass poison
Parasect	1	bug grass
Exeggcute	28	grass psychic
Exeggutor	1	grass psychic
Hoppip	20	grass flying
Skiploom	22	grass flying
Jumpluff	22	grass flying
Sunflora	17	grass
Celebi	1	psychic grass
Shroomish	10	grass
Breloom	1	grass fighting
Roselia	21	grass poison
Cacnea	13	grass
Cacturne	13	grass dark
Cradily	1	rock grass
Turtwig	29	grass
Grotle	32	grass
Torterra	33	grass ground
Roserade	1	grass poison
Cherubi	10	grass
Cherrim	10	grass
Leafeon	20	grass
Shaymin Land	19	grass
Snivy	19	grass
Servine	20	grass
Serperior	20	grass
Pansage	16	grass
Cottonee	8	grass fairy
Whimsicott	1	grass fairy
Petilil	8	grass
Lilligant	1	grass
Deerling	13	normal grass
Sawsbuck	13	normal grass
Chespin	15	grass
Quilladin	15	grass
Chesnaught	15	grass fighting
Skiddo	12	grass
Gogoat	12	grass
Phantump	23	ghost grass
Trevenant	23	ghost grass
Pumpkaboo Average	20	ghost grass
Gourgeist Average	20	ghost grass
Comfey	4	fairy
Tapu Bulu	26	grass fairy
Celesteela	19	steel flying
Flapple	12	grass dragon
Appletun	12	grass dragon
Calyrex	64	psychic grass
Smoliv	34	grass normal
Dolliv	37	grass normal
Arboliva	39	grass normal
Wo Chien	25	dark grass
Shaymin Sky	19	grass flying
Pumpkaboo Small	20	ghost grass
Pumpkaboo Large	20	ghost grass
Pumpkaboo Super	20	ghost grass
Gourgeist Small	20	ghost grass
Gourgeist Large	20	ghost grass
Gourgeist Super	20	ghost grass
Venusaur Mega	1	grass poison
Exeggutor Alola	1	grass dragon
Calyrex Ice	64	psychic ice
Calyrex Shadow	64	psychic ghost
Lilligant Hisui	1	grass fighting

Learnt through Breeding (Egg Moves)

These Pokémon learn Leech Seed through Breeding (Egg Moves) at the level specified

Name ⇧⇩	Level ⇧⇩	Type ⇧⇩
Oddish	0	grass poison
Paras	0	bug grass
Tangela	0	grass
Chikorita	0	grass
Sunkern	0	grass
Treecko	0	grass
Lotad	0	water grass
Seedot	0	grass
Tropius	0	grass flying
Carnivine	0	grass
Snover	0	grass ice
Maractus	0	grass
Ferroseed	0	grass steel
Morelull	0	grass fairy
Grookey	0	grass
Gossifleur	0	grass
Sprigatito	0	grass
Bramblin	0	grass ghost
Toedscool	0	ground grass
Capsakid	0	grass
Voltorb Hisui	0	electric grass