Imagine if you will, that you are a perennial plant that is just in the early stages of waking up from a long winter slumber. Imagine, your leaves warming in the spring sunshine. The soil about your roots is slowly warming too, creating within you the need to grow. In these first weeks of warmth your growth is slow, deliberate almost - you don`t want to destroy your vital cells by going all out into growth only to be hit by a late hard frost.
Then imagine that you are not alone. Around you are millions of similar plants, all doing exactly the same, all competing with you for the limited resources that are available. Some of these plants are your exact species, some of them close relatives. But some other plants are different, nasty aggressive plants (like buttercups) or simply those that just like to fill the gaps left by the unfortunates that didn`t make the trials of life and some, (like snowdrops), appear and then disappear, not causing you any bother at all. Your roots find a small source of nutrient that the human who keeps on walking on you has kindly provided and your xylem goes into overdrive, sending sap and food into your leaf cells. It is great to be alive, despite the occasional haircut. For those of you who haven`t yet guessed; you are a grass plant. Perhaps an American Timothy grass, perhaps a Creeping Bent, it matters not. You have a function to perform and all that matters is that you grow well enough to carry out this task, which is of course to spread your pollen or rhizome, to perpetuate your race.
Now imagine that in these spring days, all you want to do is grow your leaves, which after all is how you make food, some of which you will use immediately and some you will set aside for next winter. Then some fool of a human comes along with a big metal rake and scrapes the living daylights out of you and the soil around you in order to remove the moss that is very kindly snuggling up to you, holding the mositure in the soil. Now, instead of growing your lovely leaves you have to spend the next few weeks regrowing your roots, in order that you don`t dry out in the rigours of summer.
The moral of this story? Don`t scarify the lawn in spring. If you truly want to rid the lawn of moss, which is perfectly acceptable in some cases, now is the time to consider a dressing of lawn sand. It can be bought from any of our wonderful garden centres and the instructions given are quite simple, offering your grass with the best opportunity at this time of year to grow, whilst ridding your lawn of your bugbear. However, a word of advice. Before you go and try any chemicals, always read the label - some are not pleasant on the skin or indeed if ingested. Also, make sure your `lawn` isn`t going to look a little bald once the moss has gone. (It is surprising how much moss can be in a lawn.) If however, after all I have said, you are intent on using the tined rake, wait until Autumn. The grass will love you better for it and have time to recover over the autumn months, if given a little bone meal root feed as way of recompense.
-- Guy Deakins