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


LIMGRAVE 1
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


Weeping Peninsula
Follow the main road and climb up a small hill


Siofra River
Can be found in Siofra River


Capital Outskirts
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.


Mt. Gelmir
One can be found underneath a Phantom Tree.


Lux Ruins
Found just north of Lux Ruins


Leyndell Royal Capital
Found on a balcony

