Updated 11 September 2026
When is the best time to find Slippery Jack in Västra Götaland?
Slippery Jack usually come up in Västra Götaland from August to November, and right now they’re at 69% 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.
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.
Västra Götaland stretches from the rocky skerries and granite islands of the Bohuslän coast inland across the flat farmland of the Västgöta plain to Lake Vänern and the wooded uplands of Tiveden and the table mountains around Billingen. It is a varied county where the open sea, big lakes and rolling forested ridges all meet. Spruce and Scots pine dominate the inland forests, mixed with birch, oak and beech in the milder southwest, while damp lakeshores and mossy ridges add wetter habitats. Chanterelles favour the mossy spruce and pine woods, while the calcareous soils around Falbygden and the broadleaf stands support porcini and many other species.
The county has a mild, maritime climate near the coast, growing slightly more continental towards Vänern and the eastern uplands. Autumn is reliably damp with frequent rain off the North Sea, which keeps the woods moist well into October. Foraging is a popular pastime here, helped by the Swedish right of public access (allemansrätten) that lets you pick freely in most forests. Expect a generous chanterelle and porcini season from late summer through autumn, with the richest finds in the mossy conifer woods inland and the lime-rich soils of the Västgöta plain.
FAQ
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 Västra Götaland, 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 Västra Götaland, Sweden work?
We take the usual slippery jack season for Västra Götaland, 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 69% and looking good, plus a 14-day outlook and a normal-year line to compare against.
When is slippery jack season in Västra Götaland, Sweden?
In Västra Götaland, 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 Västra Götaland, Sweden reads 69% and conditions are looking good.
Where do slippery jack grow in Västra Götaland, Sweden?
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 Västra Götaland, Sweden so you know when it is worth heading out.
How do I know slippery jack season has started in Västra Götaland, Sweden?
Season usually kicks off after a warm spell followed by steady rain, with the first flushes appearing somewhere in the August to November window. The clearest sign is the live forecast lifting off zero into ‘just starting’ or ‘building’. For Västra Götaland, Sweden it currently sits at 69% and is looking good.
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.