I actively garden, so highly used seeds for crosses like almond seeds I always keep stock in multiples of five. I have access to three gardens, so I always keep x15 on hand and use me BTN retainer to replenish when I use them up until I have x15 again. The reason I keep in multiples of five is because it is usually the seed I sacrifice to get a full set of cross chances going.

Almond seeds are definitely worth using up an inventory slot. I've seen the damn things go up to 35k a packet on my server.

Oh, and if you think those are bad. Give mandrakes a try