Some Valheim questions have short answers that a general guide buries under three paragraphs. These four — portals, planting, comfort and fishing — are the ones people ask most and get answered least directly.
Portals: the tag rules
Portals connect by tag, not by pairing them by hand. The tag field is case-sensitive and limited to ten characters; letters, numbers and special characters all work.
Two portals with a blank tag connect to each other. That default is what most people use, and it is also the source of the first confusing failure: a second blank-tag pair in the same world will connect to itself, not to the pair you meant.
When more than two portals share a tag, they pair off in the order the tags were set. Four portals tagged asdf become pairs one-two and three-four. Each portal links to exactly one partner, so a fifth portal with that tag is not going to join the network — it starts a new pair.
Three other rules worth knowing:
- A portal needs a Workbench in range to be placed, but not to work afterwards.
- The recipe unlocks the first time you hold Finewood, a Surtling core and a Greydwarf eye together.
- Portals are bidirectional; the “front” only affects how close you must be before the audio and visual cue of a live connection triggers.
The teleport blocker. Ores and their smelted counterparts cannot travel through a standard portal — there are 21 such items, including Copper, Copper ore, Copper scrap, Tin, Tin ore, Bronze, Scrap bronze, Iron, Iron ore, Iron pit, Scrap iron, Silver, Silver ore, Black metal, Black metal scrap, Flametal, Flametal ore, Dragon egg, Dvergr extractor, Charred cogwheel and Mechanical spring. Their icons carry a crossed-out blue portal to warn you.
A Portal stone moves all of them. That single item is why late-game bases do not need a longship run for every load of silver.
Planting: what stops a crop
The Cultivator is a Forge tool made from Bronze and Corewood, and it does three jobs: tilling soil, planting seeds, and restoring damaged ground (grass, lily pads, shoreline sand, cattails).
Crops need cultivated soil, and they will not grow if any of three conditions is true:
- Wrong biome
- Not enough space
- Not enough sunlight
While growing, a planted crop shows a status next to its name — “Healthy” means it is progressing normally.
Concrete numbers for the two first crops:
| Crop | Grow time | Seeds produced | Space | Biomes |
|---|---|---|---|---|
| Carrot | 1h 6m 40s – 1h 23m 20s | 3 | 1 m | Meadows, Black Forest, Plains |
| Turnip | 1h 6m 40s – 1h 23m 20s | 3 | 1 m | Meadows, Black Forest, Swamp, Plains, Mistlands |
The range is not a bug: growth is randomised within that window. Three seeds back per harvest is what makes farming self-sustaining after the first planting, and it is why one early carrot patch is worth more than a stack of foraged food.
Using the Cultivator costs stamina, which matters on a large farm — Hildir’s clothing exists partly for that.
Comfort: the formula people never see
Comfort determines how long your Rested effect lasts, and the arithmetic is simple:
- 8 minutes at Comfort 1
- +1 minute per additional Comfort level
- Normal ceiling 22 (29-minute Rested), 23 with a Maypole, 24 with the seasonal Yule tree (31 minutes)
The rule that decides most builds: only the highest-comfort item in each category counts. Two rugs give one rug’s worth. Categories are Base Comfort, Fire, Rug, Table, Chair and so on, and items with no category stack with other uncategorised items but never with themselves.
Two details worth knowing:
- Hearth beats a campfire. Fire is worth 1, Hearth is worth 2, and the Hearth also provides the Fire effect out to 12 m with the extra comfort point out to 8 m.
- Shelter adds a point — sitting near a fireplace gives 1, being sheltered near one gives 2.
A campfire inside a Burial Chamber gives Comfort 3 and a 10-minute Rested effect, which is the cheapest dungeon buff in the game.
One caveat on the numbers: the wiki’s Comfort page carries its own note that it is not fully updated to the Valheim 1.0 Deep North release, so treat the 22/23/24 ceiling as the pre-1.0 figure if a newer item pushes it higher.
Fishing: the costs
Fishing needs a rod and bait, and both come from Haldor:
- Fishing rod: 350 coins. It can also be found near a runestone deep in some Frost Caves.
- Fishing bait: 10 coins for 20. Other bait types are crafted from basic bait plus trophies to catch fish from other biomes.
You can also skip the rod entirely — fish occasionally strand on shores or even jump into a boat.
Mechanically: hold attack to charge a cast, release to send the line, press Block when the bobber goes under to hook, hold Block to reel. Casting, holding a fish and reeling all cost stamina, and a struggling fish costs substantially more. Run out and the fish escapes. Move more than about 30 m from the bobber and the line releases. Once the fish is within roughly 1–2 m, look at it and press Use to pick it up.
What to do first
If you are early and short on time: plant carrots. It is the only one of these four that pays you back daily, and the 3-seed return means one investment covers the rest of the game.
If you are mid-game and hauling metal: fix your portal tags. Two blank-tag portals plus a Portal stone at each end removes most longship trips.
If you are dying to the cold or the dark: build a Hearth indoors. Comfort 2 from one item plus shelter is a 10-minute Rested effect, which is the difference between a productive night and a death run.
Fishing is the lowest priority of the four unless you specifically want the fish recipes or the Fishing skill — it costs 350 coins before it earns anything.
Related guides
- Valheim hub — all guides for this game.
- Valheim food and mead guide
- Valheim base building guide
- Valheim crafting guide
- Valheim taming and breeding