Sand Bloom Bulb
From A Wiki in the Desert
|Sand Bloom Bulb|
Sand Bloom Bulbs are found occasionally by inspecting Odd Weeds once you know Fungiculture 3 (Skill).
You can also reproduce more bulbs by planting the Sand Blooms and applying Flower Fertilizer to them until a new bulb is produced or trade for them.
Also see Flowers for more info.