Pink, Yellow and King Oyster Mushrooms Compared: Which to Grow

The clearest way to see how pink, yellow, and king oyster mushrooms differ is a 2017 Turkish trial that grew all three species in identical bags in the same room. The average king oyster weighed 1.9-2.6 oz (55-75 g), the average pink oyster up to 0.6 oz (18 g), and the average yellow oyster 0.1-0.2 oz (3-5 g). Yet all three produced about the same amount per bag: 3.5-4.1 oz of mushrooms per pound of substrate (220-260 g per kg). The difference lies elsewhere: how many mushrooms that harvest is split into, and how long you wait for it. Pink oysters formed their first pins 19-25 days after inoculation. King oysters gave their first harvest only after 38-50 days.

This article covers the three Pleurotus species most often sold as grow kits and spawn: pink oyster (P. djamor), yellow or golden oyster (P. citrinopileatus), and king oyster (P. eryngii). The common oyster, P. ostreatus, and its strains have a separate article: oyster mushroom biology and strains.

Three species under identical conditions: the numbers side by side

Under the same conditions, the three oysters yield about the same per pound of substrate and differ in mushroom size and speed. Fuat Atila ran the trial and published it in the Journal of Experimental Agriculture International (2017). The substrate was 80% crop waste, 19% bran, and 1% gypsum, in bags of about 2.2 lb (1 kg), sterilized in an autoclave. Spawn ran in the dark at 77 °F (25 °C). Fruiting took place at 61-64 °F (16-18 °C) and 85% relative humidity, with 8 hours of light a day. The four wastes were oak sawdust, bean straw, safflower hay, and sunflower heads.

Days are counted from inoculation. For pink and yellow oysters, harvest came another 3.5-7 days after the pins appeared. Divide the yield by the average weight, and a bag of king oysters comes out as a few large mushrooms, while a bag of yellow oysters comes out as a few dozen small ones.

Biological efficiency in this trial came out at 67-78% for all three species. Other studies report 150% or more for the common oyster, but you can’t compare these numbers across trials: they depend on conditions and on how many flushes were counted. What the metric means is explained in the article on the common oyster.

King oyster: the biggest mushroom and the longest wait

King oysters take the longest of the three and like it cool, but they give a large, dense mushroom that keeps longer than other oysters. In Atila’s trial, the first harvest started on day 38 on bean straw and on day 50 on sunflower heads. On oak sawdust, there was only one flush in 60 days. Straw and hay gave two flushes, but the second produced less than a third of the harvest: 51-53 g per kg against 168-183 g in the first.

Commercial growers fruit them cool. In Korean industrial production, king oysters grow in bottles of about 29 fl oz (850 mL) filled with sawdust, and the fruiting room is held at 59 ± 4 °F (15 ± 2 °C) and 80 ± 5% humidity (Choi et al., Molecules, 2011). For a home kit, Cornell University advises higher humidity than for the common oyster, and sometimes scratching the surface or adding a casing layer. The bag is cut at the top, leaving about 3 inches (7.5 cm) of plastic above the substrate to hold in moisture. There’s more on this in our review of mushroom grow kits.

Shelf life is the king oyster’s main advantage. According to a 2023 review in Foods, fresh king oysters keep for 1-3 days at room temperature and 4-7 days at 39 °F (4 °C). At 39 °F, the color barely changes for the first 6 days, and slight browning shows up on day 9. Researchers in India (Scientific Reports, 2021) write that king oysters have the longest shelf life of any oyster mushroom: the flesh is dense and holds less water.

King oyster spores are worth keeping in mind too: in Japan, cases of hypersensitivity pneumonitis have been described in workers at king oyster farms. Those cases are covered in the spores section of the article on the common oyster.

Pink oyster: the fastest, and it likes heat

Pink oysters produce a harvest sooner than the other two and fruit in warm conditions, which makes them the summer choice. In Atila’s trial, they colonized safflower hay in 16.4 days, while yellow and king oysters took 20. First pins appeared on day 19-25, and over 60 days they gave three flushes: over 60% of the harvest in the first, 26-30% in the second, and the rest in the third.

In Thailand, pink oysters are grown on sawdust at 77-82 °F (25-28 °C) and 70-80% humidity (Scientific Reports, 2025). Pins show up 5-10 days after the bag is opened, the mushrooms mature in 4-5 days, and they’re picked daily. In the Turkish trial, the same species fruited at 61-64 °F (16-18 °C). So pink oysters handle a wide range, while Korean king oyster farms hold 59 °F (15 °C). That gap of about 18 °F (10 °C) decides which of the two to put in a warm room in summer.

Substrate affects both yield and mushroom size. The best biological efficiency came on bean straw and safflower hay, 78%, and 62.5% on plain oak sawdust. Mushrooms on straw were also the largest, 0.6 oz (17.6 g) on average. If a block won’t fruit, work through the list of seven reasons a mushroom block refuses to fruit.

Yellow oyster: small, wood-loving, and escaped into the wild

Yellow oysters give as much by weight as the others, but in small mushrooms of 0.1-0.2 oz (3-5 g); they do best on wood, and in North America they have become invasive. In Atila’s trial, their best substrate was oak sawdust, at 73.9% biological efficiency. They were the only one of the three species whose yield correlated with the substrate’s lignin and cellulose content. Over 70% of the harvest came in the first flush.

The golden oyster’s escape from cultivation was reported in Current Biology in 2025 (Veerabahu et al.). The species is native to East Asia, was brought to North America in the early 2000s, and is sold there in grow kits. It was first found in forests around 2010. The researchers sampled wood from 26 dead elms in Wisconsin. Trees with golden oysters hosted about half as many fungal species: a median of 22 against 42 in trees without them.

In 8 years, the golden oyster spread to 25 US states and one Canadian province, and the authors’ model predicts that climate change will make more of the continent suitable for it. The GBIF database also holds records of naturalized golden oysters in Europe and Africa. The authors suggest growing local species or developing sporeless strains.

For home growers, the practical takeaway: keep a golden oyster block indoors, and don’t set it outside to fruit, where spores can drift to trees. Don’t bury a spent block near living or dead trees either.

Which oyster mushroom to grow

The choice comes down to the temperature of your space and how long you’re willing to wait. Measure the room temperature before you buy; choosing the room itself is covered in basement, garage, or greenhouse for mushrooms.

Per pound of substrate, all three oysters yield about the same, 3.5-4.1 oz. So pick by conditions: in a warm room, pink oysters pin in the third or fourth week, while king oysters need a cool space and 2-3 more weeks to the first harvest.