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for sowing next year's coriander crop. Allow the seeds to ripen fully on the plant before harvesting.In the greenhouse I save seed from chillies, tomatoes and sweet peppers. The rule of thumb here is not to save seed from F1 hybrid varieties, as their progeny

the Guinness World Record of 8.03m (that's over 26ft in old money), but who knows?With thousands of Gardeners' World magazine readers now sowing their free sunflower seeds too I think we'll all have some stiff competition...

of newspaper in a warm, dry place they'll continue ripening, and I'll be able to shake out the seeds.The best germination comes from sowing right away, and not saving for another day. Just sprinkle seeds onto the surface of compost in a large pot and cover

few bits to friends, too. If I wanted more I could save some of the ripe seed capsules and sow them to raise new plants, but I think one clump is enough.Apparently you can find it growing wild in parts of southern England, especially on lime-rich soils

-pods of honesty look charming, adding interest when many other worthy perennials have given up the ghost for winter.Seed will naturally fall onto surrounding soil, sowing itself, with new seedlings emerging next year. Alternatively, seed can be saved to raise new

warmth for early sowings. Of course I'll be keeping heat to a minimum, and insulating the greenhouse with bubble polythene to reduce heat loss, but my environmental conscience keeps asking me the same question.Looking at things another way, I wonder if it

premium.However, this year I decided to grow my onions from seed, and I've just been assessing the results. Yes, I did need to sow them in modular trays in the greenhouse in March, and could have started them even earlier if I'd had a heated propagator

, above) I'd recommend sowing fresh seed in March/April in a warm greenhouse or on a windowsill.When it comes to self-seeding, this generous verbena usually obliges each summer. Just let the seed fall from plants where they grow, and with luck you'll enjoy

one? Well, I trialled sweetcorn 'Rising Sun' last summer, and the memory of eating those crisp, sweet, delicious cobs in August still remains. My seed is ordered, and I can't wait to sow it in April for crops this summer. That's one down - I now just

and scented sweet pea. The list goes on.Hardy annual seed can be sown directly into your garden borders where they will flower - no messing round with pots, seed trays or pricking out. Just sow where you want colour, and leave them to it (well, a little bit