From Longman Dictionary of Contemporary Englishbed something ↔ out phrasal verbto put plants into the ground so that they can grow → bed→ See Verb table
Examples from the Corpus
bed out• A bed just climbed out of.• I jackknife up in bed, peer out.• She slides her hand under the mattress on the double bed, brings out a revolver and slips it into her bag.• Four others survived by hiding behind a cupboard, ducking under a bed and dangling out a window.• I swung my boots up on to the bed and stretched out full length.• David and Harriet lay side by side in their connubial bed, lights out, the house still.• As the chain turns the buckets bite into the canal bed and scoop out the mud.• An Hour of Misfortune Simon stood by his bed looking out the window. 