Normally, now is a good time, but it depends on the conditions, and what product you use. I only do it once or twice at most here. Others may do it more often. The granular ones need dampness, and watered in within a few days. Liquid ones are easier if conditions are drier.
It's a place where beautiful isn't enough of a word....
I live in west central Scotland - not where that photo is...
I usually feed the lawn in spring (sometime soon when we get a reasonably promising forecast of rain), maybe again in the summer, maybe late June/early July if there's rain, but not if it's dry and growth has slowed down, with an organic lawn food - no weed/mosskiller. Then an autumn feed sometime in September. Last year when I bought the autumn feed the company had a winter lawn feed as well so I got some and put it on in late January, but I don't think it made a lot of difference so I won't bother with that again.
Doncaster, South Yorkshire. Soil type: sandy, well-drained
Be absolutely rigorous with measuring out the area to be treated and the amount applied to each square metre/yard. We get more reports of damage done to lawns by over application of lawn feed each year than almost anything else.
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
That's one of the reasons I switched to the organic feed for spring/summer. The greening-up effect is a lot less dramatic than with chemical feed, but I think it's harder to overdose than it is with the feed & weed products. I once used a spreader for feed & weed and got dark lines (not completely black or dead) where I'd overlapped a bit. It took months to grow out.
Doncaster, South Yorkshire. Soil type: sandy, well-drained
I was thinking about the need to ensure any non-liquid feed is well watered in, if the sun is high in the sky and strong. I also understand that the usual grass species used in the US for lawns are different to those usually used in the UK.
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
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The granular ones need dampness, and watered in within a few days. Liquid ones are easier if conditions are drier.
I live in west central Scotland - not where that photo is...
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
It also depends on what type of soil you have to its CEC Rating
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
Grass species and soil type are still the main factor in giving advice.
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.