Updated 14 September 2026
How are Slippery Jack doing in Aberdeenshire this September?
The best time for slippery jack in Scotland is August to November, with the peak normally in the middle of that range. Today they’re at 47% and looking good in Aberdeenshire
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.
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.
Use fresh within a day or two as the slime makes it perish quickly; peel and clean before chilling. It dries well once peeled and de-pored, and the dried slices or powder keep for months in an airtight jar; it can also be cooked and then frozen.
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.
Aberdeenshire stretches from the heather moors and rounded granite hills of the eastern Cairngorms down through the fertile farmland of the Howe of the Mearns to a long North Sea coast of cliffs, dunes and fishing harbours. The valleys of the Dee and Don thread through the county, linking upland glens to the lowland plain around Aberdeen. Native Scots pine and birch survive in old Deeside woods like Glen Tanar, while extensive conifer plantations of spruce and pine cover the lower hills. Mixed broadleaf stands of oak, beech and birch along the rivers, together with mossy pine forest floors and grazed pasture, give chanterelles, ceps, hedgehog fungi and waxcaps their habitats.
The east coast is drier and cooler than the Scottish west, with crisp clear spells, sea haar rolling off the North Sea and sharp autumn frosts. Rainfall is moderate but reliable, and the damp, cool autumns suit a long fungal season. Expect a classic Highland-edge mix: pine-wood boletes and chanterelles in the Deeside glens, hedgehog fungi and ceps under conifers, and jewel-coloured waxcaps on the old grasslands. Much of the land is open access under Scottish right-to-roam, though the season runs a little later and cooler than further south.
FAQ
How do I know slippery jack season has started in Aberdeenshire, Scotland?
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 Aberdeenshire, Scotland it currently sits at 47% and is looking good.
Are slippery jack out near me right now in Aberdeenshire, Scotland?
Today the slippery jack forecast for Aberdeenshire, Scotland is 47% and conditions are looking good. That is a live read for the region this September, and it shifts with the weather rather than following a fixed calendar. It tells you if it is worth heading out in Aberdeenshire, Scotland right now.
What should I look for this week for slippery jack in Aberdeenshire, Scotland?
This week in Aberdeenshire, Scotland the forecast is 47% 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 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 Aberdeenshire, Scotland right now?
For slippery jack in Aberdeenshire, Scotland, the typical season is August to November, and today the live forecast reads 47% with conditions looking good 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 Aberdeenshire, Scotland. 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.
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.