Short version: The roof has wooden garden beds. Plant seed packets, then water each bed with 1 L (hold F): the prompt tracks "Seedlings - day 2 of 6 (dry soil!)", so they take 6 days and need water. A Rain Barrel + Funnel on the roof holds 20 L of untreated rain water, and a fallen tank has about 46 litres left in it.
Rooftop Garden & Rain Water at a glance
| Beds | Wooden planters on the roof |
| Seeds | Seed Packets (picked up on the roof on Day 11 in the footage) |
| Watering | "Water the bed (1 L)", hold F; uses water you're carrying |
| Growth | Seedlings show "day 2 of 6": 6 days to grow, and they flag dry soil |
| Rain Barrel + Funnel | Water, both hands, holds up to 20 L; the water is untreated |
| Fallen tank | "About 46 litres left by the sound of it." |
Water on the roof
| Source | What the screen says |
|---|---|
| Rain Barrel + Funnel | Read 2.0 / 20 L, untreated: treat it before you drink it |
| Fallen tank | About 46 litres left by the sound of it; the valve beside it reads "Valve shut" |
| Bent valve | "Free the bent valve handle (wrench)", hold, with the Adjustable Wrench (Day 8) |
| Hose runoff | Warning: "Water's running off across the roof - stand a container under the hose end!" |
Growing food on the roof, step by step
- Pick up Seed Packets (in the footage they were lying on the roof on Day 11).
- Plant them in a roof bed, then water it: hold F on "Water the bed (1 L)".
- Come back daily; the label counts the days ("day 2 of 6") and calls out dry soil.
- Keep a container under the hose end or fill the rain barrel so you have water for the beds without using your drinking water.
Untreated water
Rain barrel water is marked untreated, while bottled water says "clean - safe to drink". Treatment tablets are on the items page; use the untreated water for the beds or treat it before drinking.
Tips
- Watch the Cold bar while you garden; build the rooftop shelter first if you'll stay up there.
- Bring the Adjustable Wrench (Damage 16, Reach 4.5): the roof has a bent valve handle that only a wrench frees.
- Don't water the beds with your last clean bottle: one bed takes 1 L.
FAQ
How do you grow food in 30 Floors Up?
Plant Seed Packets in the wooden beds on the roof and water each bed with 1 L. The seedlings count up to day 6.
How long do seedlings take in 30 Floors Up?
The prompt reads "day 2 of 6", so 6 days, and it warns when the soil is dry.
Where is the rain barrel in 30 Floors Up?
On the roof. The Rain Barrel + Funnel holds up to 20 L of untreated water.
Is the rain barrel water safe to drink?
The game labels it untreated. Bottled water is labelled "clean - safe to drink".
More 30 Floors Up pages
- How to Build the Rooftop Shelter in 30 Floors Up
- 30 Floors Up Food and Water
- 30 Floors Up Items and Tools
- 30 Floors Up Update 2.0: What We Know
- 30 Floors Up beginner guide
- 30 Floors Up codes
- 30 Floors Up wiki: live stats
Sources
Checked Nov 12, 2026. Community wikis are edited by players, so numbers marked “per” one wiki may change after an update.
- 30 Floors Up (Roblox) - Update 2.0 (Tam Mai Thanh Cao, YouTube, Nov 9, 2026)
- 30 Floors Up (Roblox) - Update 2.0 (Tam Mai Thanh Cao, YouTube, Nov 9, 2026)
- 30 Floors Up (Roblox) - Update 2.0 (Tam Mai Thanh Cao, YouTube, Nov 9, 2026)
- 30 Floors Up (Roblox) - Update 2.0 (Tam Mai Thanh Cao, YouTube, Nov 9, 2026)