Natural edges are the the best way to separate the lawn from mulch beds and look absolutely fantastic when done correctly! Here is how I do it using a cheap and simple tool!
Half moon edger: https://amzn.to/3euYCTp
Hoselink hose reel (save 10% using the code lawnwhisperer10): https://www.hoselink.com/?gclid=CjwKCAjwv_iEBhASEiwARoemvGprKd4SKPNAxGDCDxE94ChK7tGa0b6SM3PVQfoOEJ9YcCF1kY1SRRoCFU4QAvD_BwE
Cool season e book: https://thelawnwhisperer.net/collections/soil-health/products/e-book-the-lawn-whisperers-guide-to-cool-season-lawns
Sanctuary 11-21-21: https://thelawnwhisperer.net/collections/soil-health/products/sanctuary-11-21-21
12-0-0 Midnight: https://thelawnwhisperer.net/collections/soil-health/products/midnight-12-0-0-liquid-fertilizer-with-5-chelated-iron-1-gallon
DAB humic acid: https://thelawnwhisperer.net/collections/soil-health/products/dab-bio-stimulant-with-humic-acid-and-molasses-1-gallon