Seeds without a propagator
Got a bunch of seed packets free with a garden magazine. Looked on the back of each packet today and saw that most of them say to sow in a propagator at 15-25oC temperature range and keep a polythene bag over the top. The only packet which doesn't say that is beetroot 'choggia' so I might have a chance of that germinating. Even then the beetroot says to plant direct outside in drills in March so I probably don't even need to start them off indoors.
My house will never be at 20oC (with artificial heating) and certainly not on the windowsills where I would be leaving the seeds in their pots.
Is anyone else in the same position and what do you do to get your seeds to germinate? I don't have a greenhouse nor will I spend money on heating mats etc. My windowsills and conservatory are all I have. Conservatory will be freezing unless it's sunny, so even in there the seeds will be subject to fluctuating temperatures over the next couple of months.