The 4th of July long weekend is upon us, and hopefully you have some outdoor gathering time planned. It's an especially good time to pick up some kit to upgrade your outside space too. As part of Walmart's massive 4th of July sale, I've spotted some particularly impressive discounts on things like grills, robot lawn mowers, planters and outdoor furniture. The kind of thing that could make a huge difference to how you enjoy your outside space. I've combed carefully through all the discounts to find the gems most worth considering — you'll find my top picks below. • View the full Walmart Patio & Garden EventIf you have a large turf area, my top recommendation is to invest in a robot lawn mower. I tested a number of these during my years as a TechRadar Homes Editor, and I was genuinely wowed by how much time and effort they can save, and how neat and thorough they are, too. Segway Navimow and Mammotion are two brands I have first-hand experience of (I was extremely impressed with both) — and both have models included in the Walmart sale. Looking for a smaller-scale buy? My roundup also includes a less-than-half-price planter, several bargain BBQs and a firepit I'd love in my own back yard. Scroll down for more of the best deals...My top picks from the Walmart outdoor sale Segway Navimow X430 Robot Lawn Mower WestinTrends Malibu Outdoor Patio Porch Rocking Adirondack Chair, Dark Green Mainstays Black and White Striped Cabana Woven Outdoor Rug, 5'x7' Mainstays 28-Inch Square Propane Fire Pit Table With Convertible Metal Lid OHHANI 6 Tier Metal Corner Shelf for Indoor Outdoor Garden Mainstays Dashwood 4pc Conversation Set MAMMOTION Yuka 3000 Robot Lawn Mower Best Choice Products 8x2x1ft Outdoor Metal Raised Oval Garden Bed Zimtown BBQ Charcoal Grill With 3 Levels WestinTrends Malibu Outdoor Side Table Zimtown Electric Grill Outdoor Standing BBQ Best Choice Products 10ft Outdoor Steel Market Patio Umbrella