January Tennis Diary 2021

Editorin Tennis
Expected weather for this month:

You can now access a week by week forecast at the Agrovista Amenity Academy - www.amenityacademy.co.uk/weather

Key Tasks for January

Grass courts

Providing the courts aren't frozen or frosty, the following can be undertaken:

  • maintain a height of cut between 12-18mm
  • a cylinder mower may still be used, but it is more likely that a rotary mower will serve you better
  • box clippings to avoid the spread of disease
  • remove leaves and other debris as soon as possible – a rotary mower does a good job

Artificial courts

Keep surface clean with regular sweeping and brushing

Remove any algae and moss from surface. Sand filled systems require regular brushing to maintain manufacturer’s recommendations on sand levels and pile heights

American Fast Dry courts

  • keep surface clean, rolling to consolidate surface
  • levelling and brushing of fast dry materials, brushing to clean lines

Clay courts

  • carry out regular sweeping and brushing to restore playing levels
  • topdress any hollows or damaged areas


  • carry out regular sweeping and brushing
  • repair any hollows or damaged areas

Other Key Tasks

  • repair and maintain fence lines
  • cut back any hedges and trees and prune shrubs
  • take down and store all tennis equipment, ensuring that it is clean and dry before doing so
  • repair/update equipment as necessary

Whilst many of the above actions may appear to be common sense, it is surprising how some things can get overlooked, often due to the lack of daylight hours. The more that club members, players and officials understand what you role involves, the better. You could use any spare time to provide a members newsletter/blog detailing what problems you are experiencing (disease outbreaks, algae and moss, waterlogging etc.) and to seek additional help as required.

With many clubs allowing and, indeed encouraging, play on their artificial surfaces through the winters months (when weather conditions allow), it is imperative that these courts are completely free from moss, algae, leaves or anything else that might pose a slip hazard.

The new year is among us and let’s hope with it we have a way through to getting back some “normality” in our lives. I would like to think that, although many will have just experienced a much different Christmas period, it has still been filled with happiness and good feeling, even if we haven’t been able to share it with all of whom we would have liked.

If fortunate enough to have had a Christmas break, this can be an excellent time for some to switch off from work and re-charge ready to go again in the new year. For others, it is some time to step back, away from the day to day duties and reflect on the previous year and start the planning process for the new year. Either way, hopefully the Christmas period has given everyone that much needed break and now 2021 can be tackled head on.

Early January looks forecast to have favourable conditions, moving away from the wet weather that is given for the end of December, rounding off a very wet end to the year, which has seen many sites saturated for lengthy periods of time. Temperatures appear to be moderate for the time of year with an absence of any extremely cold weather. Although grass growth has slowed down, the mild temperatures will still offer some growth, therefore keep monitoring growth potential data and plan accordingly.  

At the start of a new year, attention inevitably turns to planning the year ahead.  When considering nutritional programmes for the coming months, following an integrated approach will provide the most effective programme. It is not necessarily individual elements of a programme that will provide total success, rather how all the elements interact with each other and how they will achieve the overall goal together that needs to be considered and applied.

To gain an understanding of what’s going on within your soil, annual soil samples are a useful starting point, this provides data which can be monitored over time. Together with a soil’s physical properties, the chemical nutrient balance with the soil provides the basis of recommendations for an informed fertiliser programme. These recommendations are based on the sufficiency level of available nutrients (SLAN) (other methods are available). The level of nutrients present in the soil are measured through analysis and are compared to an optimal or guideline level. Adjustments to nutrient inputs can be made following the concentrations in the soil analysis. Other analysis methods available consider further factors such as soil properties and growth potential.

Building up data enables you to make more informed decisions. This data can be used within a monitoring system that can be cross referenced against previous results to help detect any trends and diagnose problems. This will ultimately improve quality and reduce costs.

Key factors for early 2021


There will typically be minimal requirements for nutritional inputs by the plant this month as growth will be limited by colder temperatures. Photosynthesis is controlled by enzymes and, as with other enzyme-controlled reactions, the rate of photosynthesis is affected by temperature. At lower temperatures, the rate of photosynthesis is limited by the number of molecular collisions between enzymes. If temperatures are mild, there may continue to be small amounts of growth and therefore applications of a suitable fertiliser may be applied in small amounts to support the requirements of the plant.

Applications of products containing calcium and silicon will assist the plant to withstand stresses from cold temperatures and harsh winds, and by strengthening the primary and secondary cell walls. Chelated iron can be used to add colour and will not contribute to the accumulation of problematic iron deposits in the soil over time. Pigments can also be used on surfaces where contact sport is not played, where transfer onto playing kit may be an issue. Pigments not only provide a natural healthy green appearance to turf without having to apply nitrogen or iron, but also improve turf quality and have been shown to increase surface and soil temperatures in small amounts.

When constructing an integrated nutritional plan, evaluate the products available and assess their merits and how they may benefit your situation and help you to achieve your goals. Products are not all the same and, where they may appear so, there may be subtle differences which can impact on results. Therefore, where possible dedicate time to research the full ingredients list on products rather than solely looking at headline figures. If you are still unsure, then Safety Data Sheets will sometimes list ingredients if they are contained at concentrations which have to be declared in the interests of environmental and human health. If not readily available, suppliers should also be able to provide you with the information you require to understand what is in the products you are considering using.


Favourable conditions of mild temperatures and continued leaf wetness will provide a suitable environment for the development of diseases such as Microdochium nivale. If required, a fungicide with an anti-sporulant, such as fludioxonil, which controls dormant spores residing in the sward and thatch layer in-between outbreaks of infection. As ever, monitor weather conditions and apply a preventative application if conditions are forecast to be conducive for disease development. Applications of penetrant wetting agents and dew dispersants will continue to assist in keeping surfaces dry.


If soil temperatures are low, then worms will be avoiding cold regions at the surface. If mild and wet, there will still be activity and will still be causing major issues due to casting on the surface. There is still no chemical available to provide control, therefore continue your cultural practices to minimise their impact as much as possible. 


With some machines not currently being used, take the time to carry out an overhaul or send them away for a service.

  • inspect and clean machinery before putting away for the winter
  • replace worn and damaged parts as necessary
  • empty fuel tanks as petrol will go stale over winter
  • maintain a stock of consumables for your machinery
  • secure machinery nightly with good storage facilities and strong locks
  • record makes and models and take pictures of your equipment as additional reference
  • don’t leave it to the last minute when servicing dealers will be very busy

For all your training requirements, please contact our preferred training provider - Grounds Training.

Visit the website: Groundstraining.com or email info@groundstraining.com

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