The response of bulbs (like any plant) will vary from region to region, and even season to season. But the good catalogs do have some information (which I’ve cited below) and I also suggest calling to inquire to their customer service lines (you may have to nudge past the order person for some help if these links don’t answer for you). Also, with some bulbs (like tulips) deeper planting will yield a longer life. Again, response depends on so many factors…but hopefully there are some hints in these documents (note: in the Brent & Becky’s one, check the ‘naturalizing’ tab partway down the page as you search): http://www.brentandbeckysbulbs.com/spring/search/
Welcome! I’m Margaret Roach, a leading garden writer for 25 years—at ‘Martha Stewart Living,’ ‘Newsday,’ and in three books. I host a public-radio podcast; I also lecture, plus hold tours at my 2.3-acre Hudson Valley (NY) Zone 5B garden, and always say no to chemicals and yes to great plants.