My question is how would plants obtain helium in land?, mainly for floating in a high surface pressure atmosphere (maybe around 1.5 atm?), or at least its seeds or tiny parts of them, also it is probable that the plants could use hydrogen? Or another gas?

The idea is to have spores of those plants delivered into the air so they travel vast distances and also maybe tint the sky another colour?

Note that The atmosphere itself doesnt contain large quantities of helium.

And also how much surface pressure is needed for that to happen?

Thanks!

My question is how would plants obtain helium in land?, mainly for floating in a high surface pressure atmosphere (maybe around 1.5 atm?), or at least its seeds or tiny parts of them, also it is probable that the plants could use hydrogen? Or another gas?

The idea is to have spores of those plants delivered into the air so they travel vast distances and also maybe tint the sky another colour? Also these spores may be 5cm in diameter or bigger.

Note that The atmosphere itself doesnt contain large quantities of helium.

And also how much surface pressure is needed for that to happen?

Thanks!