Updated 11 September 2026
Are Slippery Jack out in Kronoberg yet?
The best time for slippery jack in Sweden is August to November, with the peak normally in the middle of that range. Today they’re at 74% and running strong in Kronoberg
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.
In the same pine woods and season look for other Suillus such as larch bolete and weeping bolete, plus saffron milkcaps and the occasional bay bolete or porcini on richer patches. False chanterelles and various brittlegills often share the same acidic ground.
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.
Kronoberg sits on the Småland highlands, a gently rolling inland plateau of low ridges, glacial moraine and stony, acidic soils. There is no coastline; instead the county is threaded with countless lakes, bogs and rivers, including Lake Åsnen and the Mörrumsån. Dense coniferous forest dominates, mostly Norway spruce and Scots pine on thin moraine soils, mixed with birch, and patches of oak and beech on richer ground. Mushrooms favour the mossy spruce stands, pine heaths and the damp margins of bogs and lakes.
The climate is cool and humid, with some of the higher rainfall in southern Sweden thanks to the upland setting. Wet, mild late summers and autumns keep the forest floor reliably moist for fungi. Expect classic Småland conifer foraging: chanterelles, porcini and other boletes under spruce and pine, with funnel chanterelles often lasting well into a damp autumn. Forest is plentiful and access is open under allemansrätten, though acidic ground means fewer calcareous specialists.
FAQ
What should I look for this week for slippery jack in Kronoberg, Sweden?
This week in Kronoberg, Sweden the forecast is 74% and running strong. 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 on the page shows whether conditions are climbing toward a flush or easing off, so you can pick your day.
Is it mushroom season in Kronoberg, Sweden right now?
For slippery jack in Kronoberg, Sweden, the typical season is August to November, and today the live forecast reads 74% with conditions running strong this September. 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 Kronoberg, Sweden. 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 Kronoberg, Sweden work?
We take the usual slippery jack season for Kronoberg, Sweden (August to November) and weigh it against the weather right now and over the last few days. That gives you one live number, today 74% and running strong, plus a 14-day outlook and a normal-year line to compare against.
When is slippery jack season in Kronoberg, Sweden?
In Kronoberg, Sweden, 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 (September) the live forecast for Kronoberg, Sweden reads 74% and conditions are running strong.
See the live regional forecast in the ShroomCast app.
This page shows today. The app gives you the full 14-day outlook for your area and all 14 species, so you can pick the right day before you drive out.
Scale: 0-20% very low · 20-40% low · 40-60% moderate · 60-80% high · 80-100% excellent. ShroomCast forecasts fruiting probability from weather, soil, forests and years of observations – a guide, not a guarantee of finds.
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.