Water seedlings quickly, with no flattened plants! The Dramm Redhead water breaker catalog description is, in my experience, perfectly accurate: “Softest flow of any water breaker that we have tested while still offering enough water volume. Perfect for all watering needs, especially for young seedlings. Stainless steel screen for years of reliable use.” The flow is high volume and incredibly low pressure and gentle. Admittedly, as I often water from a well, the water pressure is quite low to begin with, but I also use it with the pond pump, which puts out 50-60 psi (luxury!), and the Redhead is excellent. And, I’ve had the same head for three or four years banging around in the greenhouse and out in the field with no problems.
A 7,000′ reel just like this has been sitting in the drive shed for a while now, waiting to be tested. Ro-Drip, from John Deere, is one brand of drip tape. I can’t speak to how it compares with other drip tape, but I have heard it highly recommended. In any case, drip irrigation has serious advantages over other methods—watering with a hose, soaker hoses, sprinklers—for any size garden. It is super-efficient, the usual figure being 70% better water use than sprinklers. It also operates at low pressure, from under 10psi to around 20 max, so it can even be gravity fed from a raised container, a barrel or something much larger. It can be used on the surface, or buried.