...that:
1) when you've got loads of Courgette di Nizza seeds which cost next to nothing in Lidl, are out of date, and which although are incredibly prolific you don't actually like that much, and only 3 Defender courgette seeds (in date, costing 10 times as much), that all 3 of the di Nizza's sown germinate, but only one of the Defenders?
2) Having decided not to 'cheat' by buying supermarket pots of growing parsley to transplant because it's such a faff trying to separate them, you sow your 4-year old packet of seeds quite thickly, not expecting anything to happen, but finish up with more than you would have from the supermarket?
