Golden Seed is an Upgrade Material in the Elden Ring. This is a very special item that allows you to upgrade the number of Crimson and Cerulean Flask Uses. You need total of 30 Golden Seeds to get a maximum of 14 Flasks. Here is a list of locations where you can get it, will update as i progress through the game
Keepsake: Golden Seed 1
Can be selected as the starting Keepsake
Found In Stormhill, on the path from Stormgate to the Stormhill Shack.
Stormveil Castle 1
Can be found at the castle grounds of Stormveil Castle
Stormveil Castle 2
Can be obtained by defeating a Lesser Ulcerated Tree Spirit in a hidden underground area
Liurnia Of The Lakes 1
Can be found on the ground West of the Raya Lucaria Academy’s courtyard
Liurnia Of The Lakes 2
Found under a Phantom Tree in the manor’s upper level.
Liurnia Of The Lakes 3
Found beside poison Pods
Follow the main road and climb up a small hill
Can be found in Siofra River
Two can Golden seeds can be found under the Phantom Tree in the northwestern outer wall section.
Capital Outskirts 2
Two can Golden seeds can be found under the Phantom Tree at the Capital Outskirts.
One can be found underneath a Phantom Tree.
Found just north of Lux Ruins
Leyndell Royal Capital
Found on a balcony