{"product_id":"kings-seeds-tomato-harbinger","title":"Kings Seeds Tomato Harbinger","description":"\u003cp\u003e\u003cspan\u003eHarbinger tomato is an early Old English variety which produces a heavy yield of good flavoured medium size fruits. This variety has the added benefit that it can be grown under unheated protection as it tolerates the cool weather well.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e\u003cspan\u003eWhen to Sow Harbinger Tomato Seeds\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eJanuary to April\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eWhere to Sow\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eSow seeds underglass 0.5cm(1\/4 in) deep in pots or trays of good seed sowing compost and lightly cover with a sprinkling of vermiculite or compost. Place containers in a propagator at a temperature of 18–21°C .\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eWhat to do next\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eOnce large enough to handle, prick out tomato seedlings into 9cm (3 1\/2in) pots. Transplant to the greenhouse border soil, into individual large pots, or 3 plants per growbag when 20cm (8in) high. They can also be planted outdoors once all risk of frost has passed. Plants require sideshooting and support for the best yields. Water and feed plants regularly with a high potash feed once the first truss has set.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eMaturity\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eJuly to October.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e\u003cspan\u003eHandy Tip\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eWater regularly to avoid splitting fruits and blossom end rot.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e\u003cspan\u003eNutritional Values\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eVery high in vitamin C and lycopene.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e\u003cspan\u003eType\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eIndeterminate - single stem, remove side shoots.\u003c\/span\u003e\u003c\/p\u003e","brand":"King's Seeds","offers":[{"title":"Default Title","offer_id":48678645530866,"sku":"2555240","price":1.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0696\/4605\/7714\/files\/Webimagetelplate-2026-01-20T132632.820.jpg?v=1768915597","url":"https:\/\/www.zoarsark.co.uk\/products\/kings-seeds-tomato-harbinger","provider":"Zoars Ark Pet Superstore","version":"1.0","type":"link"}