Mushroom Windowsill Kit - King Oyster

1 Kit - 3 Litre


  • Grow handfuls of King Oyster mushrooms from your very own windowsill.
  • Delicious mushrooms will just be clutches away from your favourite dish.
  • A wonderful umami flavour when cooked and added to Asian cuisine.
  • These mushroom kits are perfect for full-time gardeners or beginners.
Despatch Within 24 Hours

Mushroom Windowsill Kit – King Oyster

Our Windowsill Mushroom Kits will allow anyone to grow King Oyster mushrooms from their very own windowsill. Handfuls of these delicious mushrooms will now be just clutches away from your favourite dish.

King Oyster is an popular variety from the mushroom family. A strong flavour when eaten raw but, celebrated for their meaty texture and umami flavour when cooked. These mushrooms make a great addition to Asian cuisine including stir-fries and rice dishes.

Mushrooms are tasty, low in calories, high in protein and a great source of fiber especially for those on plant-based diets. They provide you with vital vitamins including vitamin B, selenium, potassium and copper. With our handy kits, you’ll soon have this delicious and health beneficial vegetable at just the fraction of the cost.

Whether you’re a full-time gardener or beginner, this handy kit includes a base tray, lid, and pre spawned substrate and easy to follow instructions.

Planting and care:

Simply keep them moist and out of direct sunlight and your first crop should be ready to pick in a matter of weeks, plus you can expect at least another 2 pickings after that. Dimensions: 17.5cm (7") x 27.5cm (11") x 8cm (3½") depth. These kits need to be started on receipt and are unsuitable for storage.

Dimensions: 17.5cm (7") x 27.5cm (11") x 8cm (3½") depth.

Full growing instructions included.

Always wash your hands before you handle any of the kits to avoid bacteria contaminating the substrates and development of other moulds.

The kit contains a base tray, plastic lid and a plastic bag containing a “spawned” substrate.

When opening the kit, check if the substrate has grown completely white, otherwise cover
the base tray with the plastic lid and store for 10–14 days at 20–25°C. Make sure that you
leave the plastic bag around the substrate.

1. Cultivation: You start the cultivation process by making five 2-3cm incisions/slits in the plastic containing the substrate. Then water the substrate with ¼ litre of water, so that the surface is moist then leave the set with the plastic lid on at a temperature of 20-25°C.

2. After around 2 weeks, white pins appear, now put the kit in a room where daylight enters, at a temperature of 10–15°C but not in direct sunlight.

3. Make sure that the surface of the substrate never dries out. Moisten at least once a day with a plant spray making sure it does not become too wet. From the white pins, small stems with
grey dots appear, the so-called “cluster”. Continue to spray the mushrooms daily to prevent them drying out during fruiting.

4. Harvesting: total harvesting time may extend to three months. A cluster must be pulled out from the substrate with a turning movement, making sure that no part of flesh remains in the substrate.

Before consumption, trim the mushroom 1cm below the gills. The stems, which are slightly
tougher, can be used to make a sauce or soup.

Now the cycle repeats itself at point 3. 

You may harvest 3 times from the set. Before each harvest run, make 5 new incisions/slits
in the plastic.

Good luck and bon appetit!

Order Despatch

Orders are despatched promptly by post or parcel carrier. Seasonal items such as plants are sent separately with the estimated delivery times stated against each variety both in our catalogue and on our website.

Small items are sent by Royal Mail and larger items by courier. When ordering large items please provide your phone number so that the courier can contact you if necessary.

Please note that when several items are ordered they may not all be delivered at the same time.

Delivery Charge

Standard Charge

Packet seed only will incur a carriage charge of £2.99.

All other products incur a carriage charge of £4.99.

If your order comprises of a combination of carriage charges then a combined carriage charge of £6.99 will be applied.

Live Plants

Suttons wants to ensure that all of our plants are delivered to you in the best condition for planting. Unfortunately there are some postcodes that take longer to deliver to and therefore we can not guarantee this, so we are sorry to advise that we do not ship live plants to the following areas; HS, IV41-IV56, KW15-KW17, PA34, PA41-48, PA60-PA78, PA80, PH40-PH44, TR21-TR25, ZE1-ZE3.

Non Standard Deliveries

Unfortunately like many companies in our industry we are currently only able to supply orders to UK based customers, excluding those in Northern Ireland. We are committed to finding a way that we can resume or normal services again as soon as possible. Please accept our apologies for any inconvience caused.

Very Large items

If ordering any large items marked large lorry items  a surcharge of £5 per item will be applied. These items are also not available to areas and postcodes shown under non standard deliveries. We may need to contact you regarding delivery so please provide a contact number with all orders.

Prices include VAT where applicable.

We reserve the right to contact you and advise an additional charge where necessary and are happy to quote for carriage of specific products to more remote areas. Some items may not be available to all areas.

We reserve the right to revise any carriage charges in the event of carrier price increase or other unforeseen circumstances. We will always advise of the carriage charge before payment is taken.

All Suttons products should reach you in perfect condition, just as they left us. If you are dissatisfied in any way with their condition on arrival, please let us know within 14 days. We are only liable for the cost of the goods as quoted on the website plus the cost of delivery if the goods are faulty.

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