Oyster mushroom types, with pictures: how each looks and tastes
Four oyster mushroom types we've grown: blue, pink, black pearl king oyster and king oyster. This guide shows each one and compares how it looks, tastes and keeps.
Derick5 min read
Blue oyster has grey-blue caps, pink oyster is pink from cap to gill, black pearl king oyster grew broad, wavy caps over thick stems for us, and king oyster has thick white stems under smaller tan caps. Blue and king last up to a week in the fridge; pink keeps worst.
Our sources are North Spore's booklet and help center, Ohio State's mycology program, GroCycle, Merryhill Mushrooms, Specialty Produce and three papers, all checked 6 November 2026. We label our own reading.
What types of oyster mushrooms can you grow at home?
You can grow blue, pink, black pearl king and king oysters at home, among many others; we've grown these four. We cover cultivated blocks only: don't use these pictures to decide a wild mushroom is safe to eat (our advice). North Spore and GroCycle sell kits, so their taste and keeping lines are sellers' descriptions.
| Type | How it looks | Taste | How it keeps |
|---|---|---|---|
| Blue oyster (Pleurotus ostreatus) | Grey-blue caps, pale gills | "Very meaty" (North Spore); to some, mild "licorice or anise" (GroCycle) | 5 to 7 days in the fridge, per a review |
| Pink oyster (P. djamor) | Pink caps and gills | "a meaty, seafood-like taste" (Ohio State); "bitter when eaten raw" (GroCycle) | "under 3 days" (Ohio State) |
| Black pearl king oyster (a hybrid; North Spore's Black King, by our reading) | Thick stems; broad, wavy caps, dark grey to pale cream in our flushes | "Umami flavor with a slight sweetness" (North Spore); a possible "peppery aftertaste" (GroCycle) | "Good shelf life" (North Spore); sellers' numbers only |
| King oyster (P. eryngii, also sold as king trumpet, GroCycle) | Thick white stem, smaller tan cap in our photos | "Savory, meaty cap, and stem" (North Spore); "earthy aroma" (Ohio State) | "up to a week when refrigerated" (Ohio State) |
White, pearl, golden, phoenix and elm aren't here: we lack a clear, confirmed photo of each. Our advice: pick a type by room temperature; our oyster guide gives ranges for all nine except white.
What does blue oyster look like?
Blue oyster has grey-blue caps over pale gills, which GroCycle calls "light gray", and the blue fades as it grows (GroCycle). North Spore says caps "may have some brown, to gray, to bright blue colors" (North Spore help center), which is usually normal.
Our pair shows one cluster paling and growing in about 27 hours (our reading).
What does pink oyster look like?
Pink oyster is pink from cap to gill (GroCycle) and, when young, the hardest of the four to mistake (our reading). GroCycle says pinks are "at their most colorful when they're young", then fade "to a creamy pink color" (GroCycle).
North Spore says more light "will produce a more pigmented cap", though "Once in a great while" a block gives "little to no pigmentation despite sufficient light levels" (North Spore booklet). Cooked, pinks "turn to more of a cream or brown color" (GroCycle).
How do you tell black pearl king oyster from king oyster?
Look at the shape once the caps open. In ours, black pearl king oyster had a broad, wavy cap with gills running well down the stem, and king oyster had smaller, rounder caps and "short gills" (North Spore booklet). That's one cluster each, at stages we can't compare, so the rule is our reading.
Color helped us less. Merryhill, a UK kit seller, describes "noticeably darker, slate-grey caps" that lighten with age, against king's "beige to light brown" (Merryhill Mushrooms). Our hybrid varied: mottled grey-brown here, dark grey to pale cream on other flushes we believe are the same (our reading).
Shape changes with age too: GroCycle says young black pearl king oysters "look much like a king oyster", then "flatten out and look closer to a standard oyster mushroom" (GroCycle). In king, a high-CO2 bag encourages "thick stems and small caps"; outdoors it grows "larger, darker caps and very short stems" (GroCycle). One of our king caps went domed to flared in a day, so age could explain part of our photos' difference (our reading). On young mushrooms, go by the block's label (our advice).
Sources disagree on what the hybrid is. North Spore calls its Black King a "Hybrid of oyster and king trumpet" (North Spore booklet). GroCycle says "The exact genetics are not known" (GroCycle). Specialty Produce gives Black King Trumpet and a shorter form of our name for one P. ostreatus hybrid (Specialty Produce), so we treat Black King and black pearl king oyster as one (our reading).
Which oyster mushroom tastes best?
We found no settled answer and no taste panel comparing all four. North Spore calls blue "perhaps the most delicious and unique tasting oyster" (North Spore booklet). GroCycle says the best is "up for debate" and leans to pearl or golden (GroCycle).
Which oyster mushroom keeps longest?
Blue and king keep about equally, up to a week in the fridge (our reading), and pink keeps worst. GroCycle says pinks "will sometimes only last a couple of days in the fridge" (GroCycle); here's why.
In the fridge, two reviews give 5 to 7 days for P. ostreatus (Silva et al. 2024) and "4–7 days at 4 °C" for king (Guo et al. 2023); we couldn't trace either figure to a test of that species. In one Austrian retail study, a chain's best-before dates gave king 12 days against seven for oyster (Schill et al. 2021).
For black pearl king oyster we found only sellers' numbers and no study; North Spore's booklet gives Black King and king the same "Good shelf life". Our advice: eat the pinks first.
How do you track oyster types in Hypha?
You track each type on its own Hypha strain page, since no source can say which suits you: it shows your harvests and timing, and Notes holds your taste notes. When you create a strain, pick Black Pearl King Oyster, and King Trumpet for king oyster. Then open Grows → Strains → the strain → Performance.
Harvest → Fresh weight → Median per block needs logged fresh weights. Bulk → To harvest is the median days from fruiting conditions to first logged harvest. Only finished bulk blocks count, so both show a dash until you finish your first block.
Download Hypha; the free plan holds 25 active blocks.