[Help] Pumpkin seeds in botania: garden of glass 1.10.2

Hi, I'm playing GoG the whole day. I'm getting bones for bonemeal and let grow grass and tall grass and break it but after ~5 stacks of bones, there is no pumpkin seed. Only wheat seeds. Then I added CraftTweaker to watch what loots are get by grass and the result of '/minetweaker seeds' is 'minecraft:wheat_seeds - 10'. Is this meaning that there drops no pumpkin seeds by (tall) grass? I'm so frustrated :c