Whow, these nematodes were fresh and hungry! I have used this product before, but not from this supplier. Would recommend supplier and product with no hesitation. We have huge and voracious slugs - revolting and destructive. I use a hose applicator and actually watered the Nemaslug in during a rain shower - the following morning not a slug to be seen!. Last year, I had to wait a few days, but nope, these nematodes were raring to go. It really is a dream product - just get more than you need, as you cannot overdose. Water it in well, and water the area as normally after the first 48 hours, so that the little beasties can wash right down into the soil and start feeding on the slugs and eggs ... GRREAT! I notice a reduction in snail population too, although it is not supposed to affect snails, but I reckon the nematodes like the baby snails underground as a change! This product is one which I apply with a huge sigh of relief, as I LOATHE slugs and ours just sneer at any slug-killer and walk over it. Once this stuff is watered in, they just stop appearing - no bodies, no squelchy, exploding bombs under foot in the dark, nothing - occasionally the odd torpid, stiff slug makes its way out, but they are obviously not happy or healthy, hooray. Oh I am cruel .... The 'every six weeks' application is approximate, but not far out - once you see slugs appearing, get some more - and do apply a final dose at the end of the season to kill off those pesky, revolting eggs, to give a bit of a start for the next growing season. Here in S. Devon, the slug season is really all year, so I bless the day that a farmer friend of mine from Wales told me about nematodes. The stuff is not even gruesome, just like cream-coloured damp flour. It keeps well in the fridge and they supply it with a good use-by date. Go on, if you hate slugs like me, try it - well worth it.!