Extracting weeds from an artificial lawn requires a very different technique to that applied to a lawn of real grass. I soon found this out when I tidied a neighbour’s back garden last week. For a start, a hand fork or trowel is unnecessary since the weeds seem to embed themselves into the weave of the material to which the ‘grass’ is attached. No need here for a sharp implement to loosen the soil around the weed’s roots before yanking the weed from the ground. Instead, the weed needs to be grasped between thumb and forefinger and gradually pulled up with a final gentle twist to keep the roots intact. I have never seen roots so clean! I was surprised to see that even an artificial lawn can host weeds but the weeds I removed were ephemeral weeds like groundsel (Senecio vulgaris) and hairy bittercress (Cardamina hirsuta). No ‘lawn spoiler’* to worry about here like greater plantain (Plantago major) . And I suppose that is the merit of an artificial lawn: even if some enterprising little weeds manage to embed themselves into the surface of the material, the long-rooted perennial weeds cannot penetrate the thick polypropylene base.
This was my first experience of working with synthetic grass and although I’m by no means a convert, I can see that compared to a real lawn there is no need for cutting, edging and feeding. This lawn looked particularly authentic and included material which seemed to mimic the straw-coloured thatch that accumulates at the base of grass stems over time. In a real lawn this has to be raked out from time to time to make room for fresh blades of grass to grow.
As I carefully removed the weeds I began reflecting on the growing popularity of artificial grass and not only in domestic gardens. A mile and a half from here, were it not for the Coronavirus crisis, the newly built stadium to be shared between Brentford FC and London Irish RFC would soon have opened its doors for the first time. We hope it will still open in time for the new season in the summer. Having read somewhere that many modern football pitches are created using a hybrid of real and synthetic grass, I determined to find out more. I approached Nity Raj, a parkrun friend and director of Brentford FC, to ask him about the system used at the club’s current ground, the dearly loved Griffin Park, and at the new Brentford Stadium at Kew Bridge. Little did I know as we chatted on Saturday mornings over peppermint tea after the weekly 5k run at Richmond’s Old Deer Park, that Nity knew anything about this topic. Here he generously shares what he knows about football pitch technology:
‘The current pitch at Griffin Park is a stabilised natural grass pitch. The stabilised element comes from a plastic weave which was woven into the turf before the grass was grown and the turf was cut and relaid at Griffin Park. It looks a bit like a tennis net, but with smaller squares. The plastic matrix significantly reduces the amount that the surface is broken up during play making the regular pitch works much easier to manage and repair of damage more effective. We haven’t always had this kind of stabilised pitch. Until the summer of 2015 the pitch was a normal seeded grass pitch. We worked with specialists to re-lay new drainage and an entirely new pitch, incorporating the plastic matrix. Since then I am told we have had the best pitch we have ever had in our history, with significantly less damage visible, especially during bad weather periods, when previously the pitch was prone to getting very badly damaged especially in the high traffic areas of the pitch.
In the new stadium we are installing a Desso Grassmaster pitch. Desso are the leading pitch tech company and their pitches are used in many of the most prestigious football and rugby stadiums in the world.. Desso have a different system from the one used at Griffin Park in that it involves a machine injecting fibres into the ground. We believe this kind of system will best suit the pitch being used for football and rugby.
It’s worth saying that the pitch at Griffin Park and the pitch at the new stadium are both virtually indistinguishable from ordinary grass pitches. The pitches look, play and smell exactly like grass pitches except for their ability to rejuvenate and resist damage. Without careful management by our excellent groundsmen, they would also be susceptible to weeds, just like any wholly natural grass surface’
The list of venues in the Grassmaster Wikipedia entry reads like a roll-call of world-famous soccer and rugby grounds and includes Wembley, Twickenham, Old Trafford, Parc des Princes, the Emirates Stadium and Anfield. And it will soon be joined by Brentford Stadium.
The hybrid pitches installed for playing professional football and rugby are a far cry from the artificial lawns which are becoming increasingly popular in domestic gardens where the lawn is laid rather like a carpet. Indeed, I’m told that some householders have been known to vacuum their Astroturf! I’ve already mentioned that there is no use for trowels or forks when weeding artificial turf. Nor for a rake as I discovered last week when I initially tried to clear away an accumulation of dried bamboo cane sheaths and leaves. I soon found that a stiff bristled brush is the ideal tool for this purpose. I confess that seeing a green expanse entirely devoid of weeds after a few hours’ gardening was surprisingly satisfying.
Am I now a convert to the pseudo sward? The answer is no, because for all its benefits- neatness, hygiene, consistency- this inert material lacks two of the essential elements of real grass. The coolness under bare feet of grass on a hot day cannot be replicated, nor can the scent of newly mown grass. In the last day or so I have detected that distinctive smell drifting across from neighbouring gardens where the instruction to stay home has prompted many householders to cut their lawns for the first time this year. And to Dig for Victory and grow vegetables, but that’s another story and one I shall address in a future blog.
*William Edmonds ‘Weeds Weeding (&Darwin)’ ISBN-10: 0711233659