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Thatch

Thatch is the mat of fibre between the grass and soil on your green. Although some thatch (5-6mm) is desirable too much can have  a devastating affect on the  playing surface.

When thatch builds up beyond the optimum level it can quickly cause problems with surface drainage, which in turn can encourage fungal diseases like fusarium patch and this can kill off huge areas of turf if left unchecked. Recovery from such attacks can also be troublesome and expensive.

This tendency to encourage disease is related to thatch’s ability to Read more

What bowls green maintenance should be carried out before a game?

Concentrate on minimising lateral grass growth for greater speed and smoothness.

OK, so this is probably a bit late for this year, but keep a note of it for future reference.

This has been a popular question on the site.

The readers who searched on variations of this theme were essentially asking, “What can be done immediately before a game to improve the playing surface?”

Green speed is hampered by excessive thatch build up, which saps some of the momentum of the bowl, so although there isn’t much that can be done about this 5 minutes before the match starts, making thatch reduction and control a major part of the maintenance strategy will help a great deal.

The other major problem in achieving speed is the control of lateral grass growth on the green. This is when grass grows along the ground instead of straight up. The grass plants develop this tendency in order to avoid damage from the mower blades. It’s an evolutionary process; the grass plants that grow this way survive to create more vegetative growth.

So we want to discourage this habit and promote survival of the more upright plants.

To do this we can employ regular grooming, brushing and verti-cutting.

Using the groomer set to 1.5mm above cutting height for the cut immediately before the game will help a lot with this. The groomer attachment on your mower is designed to tease up lateral growth just prior to being cut by the cylinder.

If you don’t have a groomer on your mower you can usually fit a static brush just behind the front roller and this can also do a good job of teasing lateral growth to the upright position prior to cutting if set properly.

Regular verti-cutting will slice through the lateral growth and tease up blades that would otherwise not be cut properly

mowing is critical to greenspeed

Think laterally for bowls green speed

Green speed is always a hot topic at this time of year and the most popular methods for achieving increased speed are usually to turn off the water and set the mower down; both of which can cause long term damage to the green.

Mowing the green regularly below 5mm can really start to harm it in terms of sward composition, drought resistance and general turf health. Rooting depth is directly proportionate to the amount of leaf that remains above, so at the very time that the turf needs deeper roots to seek out deeper lying moisture, we restrict its ability to put down roots by shaving the leaf off to within a millimetre of its life! Shaving the green too low can cause irreversible damage to the crown of the grass plants, which causes bare areas or at least areas of weakened turf, which will inevitably be taken over by meadow grass, weeds and/or moss.

The other big mistake that many clubs make is to turn off the water in an effort to induce greater green speed. Although droughting will rarely kill a green off completely, we are seeing some very high temperatures this summer and it is possible that greens will fail if not given enough irrigation. But that’s another story which you can read about here.

So, what can be done to increase green speed without causing damage to the green?

Well, to really get the speed up we need to be thinking about reducing the lateral growth on the green. There are a number of factors that can help to increase green speed and consistency for play and we’ve set them out in our guide which you can find by clicking here.

Today however, I want to concentrate on lateral growth and its affect on green speed. On many greens I visit I am told that the green is being cut at 4mm and that the members are still complaining about the green being heavy! On most occasions when confronted with this, it is possible to take the palm of your hand across the turf and tease some of the grass up to 10 or even 15mm in height!…now think about that for a minute; how “heavy” would the green be if cut at that height?

This phenomenon is due to a problem called lateral (or sideways) growth where the grass plants exhibit a  recumbent growth habit and don’t stand up straight, meaning that they are not cut at the required height.

What’s the answer?

To overcome this problem we need to make allowance in our maintenance program for dealing with lateral growth. This can be achieved by several means, in order of importance these are:

  1. regular verti-cutting; I would suggest twice a month between April and September. Verti-cutting does exactly what it says, it cuts vertically through the turf surface to slice up lateral growth and tease up the turf prior to mowing, which is usually carried out straight after a verti-cut operation.
  2. use of groomers on the mower; again a very useful operation to be used sparingly. On many of my visits I see groomers being used as verti-cutters with the blades set well into the turf. You should never do this, as it can cause a lot of turf damage and even greater damage to the mower as it can put it under a lot of strain. Groomers are designed to be set slightly above the height of cut, to simply tease up the lateral growth or “nap” prior to cutting.
  3. brushing the green prior to cutting can improve the green speed also by teasing the grass up from its lateral growth habit prior to cutting.

There are many more tips on green speed in our green speed section here.

Smooth and fast greens!

As always this season has started off with many greens playing “slow”. The usual reasons apply of course; mowing heights are still above summer level, the frequency of cutting is still low in many cases due to a really slow start to growth in many areas. Many greens are also thatchy and there has been a lot of moss about as we come out of winter, due partly to the excessively wet end to last summer and more significantly to long term Localised Dry Patch problems which are inherently linked to persistent moss problems. Oh yes and of course we are all still Read more