CropsGrape (Greenhouse) › Schiava Grossa

Schiava Grossa
Grape (Greenhouse) in the UK

Schiava Grossa is a less common but still cracking greenhouse dessert grape. It offers a unique flavour profile for those wanting something a bit different.

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Sow Plant out Harvest

Sow window for Grape (Greenhouse) generally.

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How to grow it

You're looking to sow grape seeds in March or April, starting them off inside in pots. Pop them about 1 cm deep in some good seed compost, keeping them nice and warm, around 18-20°C, maybe on a heat mat if you've got one. It takes a good while, about 170 days from seed to first harvest, so patience is key. The best way, like I say in the GrowMore CookMore app, is to get the roots planted outside the greenhouse, with the vine trained to grow inside; gives them plenty of room to stretch their roots properly.

Once your little grape plants are big enough to handle, prick them out into individual pots. When they're a bit more established, get them ready for their permanent home. Remember that trick: plant the roots outside the greenhouse, then train the vine to come inside through a small opening. This gives the roots a steady temperature and moisture, while the vine gets that lovely greenhouse warmth. Make sure you've got strong supports in place for the vine to climb, it'll get heavy.

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Track your Grape (Greenhouse) from packet to plate

Sowing reminders and harvest forecasts for your own frost dates, the Seed Tin, Scan Centre for any label or packet, and the Potty Mouth Garden Club. Free to start.

Tony C Smith
Tony C Smith

Allotment keeper in the North East of England, the voice behind the Tony C Smith YouTube channel, and the gardener who built GrowMore CookMore. Club numbers on this page update as members log their plots. Last updated 3 September 2026.