I bought most of mine last year and the previous year from T&M with no big problems. I've had a slightly bigger issue with some of their plug plants but only one set of seeds from them was an issue - and it wasn't their own branding but under Kew Gardens (ornamental thistles, terrible, terrible germination even with a second free replacement pack). My mum always buys from Suttons.
This year I've ended up with a Which? subscription and they have tested lots of the veg and some flowers for their 'Best Buys' so I'm going to try out some of those. I've also found a couple of specialist websites for pumpkins/squashes/courgettes so I'll have a play with those too. Just brought all my seed packets in today (very damp
) to check which might still be viable and which to order.
Which? has also reviewed the different seed companies for customer satisfaction and T&M didn't do great but they did have about ten times as many replies as any of the other companies. Interestingly Parkers did better and I've had huge problems with them - along with several others I know. I can't remember who came top but can probably dig it out.
If you have specific seeds in mind, I can check the Which? recommendations and let you know if you want.
H