Blooming Blossoms

You touch one to three seeds, which can be any kind, and imbue them with magic. You or someone else can throw them or hurl them with a sling. If thrown, it has a range of 60. No matter how they are used they use your spell attack bonus. Make a ranged spell attack roll against a target and on a hit they take 1d10 + your spellcasing ability modifier poison damage as the seeds explode in a blossom of pollen and spores. Hit or miss the spell ends on the seed. 

If you cast this spell again the spell ends on any remaining seeds still affected by it.

This spell's damage increases by 1d10 when you reach 5th level (2d10), 11th level (3d10), and 17th level (4d10).