Phacelia tanacetifolia The list of benefits that cover crops can offer a garden is extensive, and Lacy Phacelia is unique in that its predominant contribution is its pollinator-attracting power. On our farm, stands of Lacy Phacelia are a constant buzz of bee activity like no other plant with the exception, perhaps, of buckwheat in full bloom. This fast-growing annual wildflower produces very attractive, ferny foliage growing 2‒3 feet tall and topped with fascinating blue flowers that unfurl in a fiddlehead shape. As a cover crop, Lacy Phacelia aggressively out-competes weeds and will absorb excess nitrates and calcium in the ground. At our farm, we have found that this crop conditions the top few inches of soil better than almost any other cover crop we've grown. Lacy phacelia will germinate in soil temperatures greater than 37°F, with the optimal range being 60‒70°F. Will readily re-seed if not dead-headed, and winter kills at 20°F. Recommended seeding rate: 3 ounces per 1,000 square feet or 7 pounds per acre.