Are Slippery Jack Growing in Uusimaa This October?
🇫🇮 Uusimaa, FinlandLive forecast

Slippery Jack forecast for Uusimaa, Finland

58%
Updated: 14 October 2026

Slippery Jack: looking good.

Uusimaa
Temperature, 14 days
8°C

Average 9°, from 6° to 14°

1 Oct14 Oct
Rain, 14 days
30mm

Rainy days: 7. Wettest: 9 Oct

1 Oct14 Oct
Trees for Slippery Jack
2,798woods
Pine100%

Share of wood area by the tree slippery jack grows with in Uusimaa

Height of the woods
15–90m

where most of them lie

0–200 m
100%

Is it Slippery Jack season in Uusimaa right now?

Slippery Jack usually come up in Uusimaa from August to November, and right now they’re at 58% and looking good.

It fruits after warm late-summer and autumn rain, typically when day temperatures sit around 10 to 20C and the ground stays damp. A good soaking followed by mild nights usually brings flushes within a week or two.

It has a distinct membranous ring or partial veil remnant on the stem, an unusual feature among the slippery-capped Suillus boletes.

Grows in conifer woods, almost always with pine, on sandy or poor soil and often along forest tracks and clearings. Common in young plantations and appears in groups.

Always peel off the slimy cap skin and remove the spongy pore layer first, as both can upset the stomach. Slice and fry in butter for a soft side dish, add to risotto or stews where the texture suits, or dry the cleaned pieces and grind into a savoury mushroom powder for stocks and sauces.

A decent edible with a mild flavour, good in mixed dishes, soups and sauces rather than as the star. Always peel off the slimy cap skin, which can otherwise cause loose stools, and discard the spongy pore layer on older specimens.

Other Suillus boletes such as the larch bolete (Suillus grevillei) and weeping bolete, all of which are also edible, so there are no dangerous poisonous lookalikes. The slimy brown cap, yellow pores and ringed stem set it apart from any toxic gilled mushroom.

FAQ

How do I know slippery jack season has started in Uusimaa, Finland?

The start moves from year to year with the weather, and the first flushes usually appear somewhere in the August to November window. The clearest sign is the live forecast lifting off zero into ‘just starting’ or ‘building’. For Uusimaa, Finland it currently sits at 58% and is looking good.

Are slippery jack out near me right now in Uusimaa, Finland?

Today the slippery jack forecast for Uusimaa, Finland is 58% and conditions are looking good. That is a live read for the region this October, and it shifts with the weather rather than following a fixed calendar. It tells you if it is worth heading out in Uusimaa, Finland right now.

What should I look for this week for slippery jack in Uusimaa, Finland?

This week in Uusimaa, Finland the forecast is 58% and looking good. Grows in conifer woods, almost always with pine, on sandy or poor soil and often along forest tracks and clearings. Common in young plantations and appears in groups. The 14-day outlook in the app shows whether conditions are climbing toward a flush or easing off, so you can pick your day.

Is it mushroom season in Uusimaa, Finland right now?

For slippery jack in Uusimaa, Finland, the typical season is August to November, and today the live forecast reads 58% with conditions looking good this October. So yes or no depends on the day and the weather, which is exactly what the forecast tracks.

Does ShroomCast tell me if a mushroom is safe to eat or identify it for me?

No. ShroomCast only forecasts timing, so it tells you when slippery jack are likely to be fruiting in Uusimaa, Finland. It does not identify mushrooms, and it cannot tell you whether anything you pick is safe to eat. Always confirm your own identification from a reliable source before eating anything.

How does the live slippery jack forecast for Uusimaa, Finland work?

Every mushroom has its own machine-learning models, trained on years of mushroom records and calibrated for each region. Every day they read the weather of the last three weeks in Uusimaa, Finland: temperature, rain, humidity, soil temperature and moisture. Together with the time of year and the kind of woods and soil there, that gives the chance of slippery jack fruiting today. Right now it is 58% and looking good. The full 14-day outlook is in the app.

When is slippery jack season in Uusimaa, Finland?

In Uusimaa, Finland, slippery jack season usually runs August to November. The exact start shifts year to year with rain and temperature, so some years they show up early and some years late. Right now (October) the live forecast for Uusimaa, Finland reads 58% and conditions are looking good.

Where do slippery jack grow in Uusimaa, Finland?

Grows in conifer woods, almost always with pine, on sandy or poor soil and often along forest tracks and clearings. Common in young plantations and appears in groups. They tend to come back to the same kinds of ground year after year, so once you find good cover it is worth checking again. ShroomCast does not share exact spots; it tells you the timing for Uusimaa, Finland so you know when it is worth heading out.

ShroomCast forecasts the region and the time of year. It cannot identify mushrooms for you, so confirm any species with a reliable source before eating it.

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