How to care for your grasses

As winter slowly gives way to early spring the days gradually lengthen and this is the signal for many plants that it is time to begin their annual cycle of growth. Grasses are no exception to this and as a group they are comparatively easy going, requiring minimal attention to keep them happy. This is the time of year when a little timely care will keep them performing beautifully with little subsequent effort.

For a stunning summer time display now is the time to give most grasses the little annual attention they need in order to perform beautifully for the rest of the year.

While early spring is generally the ideal time to cut down deciduous grasses a combination of milder winters and the presence of early season bulbs may mean that the grasses in such areas will need cutting back rather earlier in order to avoid damage to the emerging foliage of bulbs and other early season plants such as primroses. Much depends on each season, but some of our areas with bulbs are cut down in early January or even pre Christmas.

In areas with early spring bulbs it is best to cut back deciduous grasses just before the bulbs appear to avoid damaging them later when in full growth. With this years mild winter we have already cut back several areas where bulbs are coming through.

There is no one best moment to care for your grasses. What you do, and when, will depend primarily on which group of grasses you are dealing with; evergreen, deciduous or semi evergreen. The individual grass descriptions on our shop pages will show which grass belongs to which group, along with some care notes for each plant.

Looking across the Long Walk borders after their annual ‘Chop and Drop’. Cutting and leaving last seasons growth of deciduous grasses in situ is not only quicker and easier to do – it acts as a great surface mulch for the coming season.

Deciduous grasses: Require last seasons growth to be cut back to the ground each year to make way for the new seasons growth. Most cutting back is usually done from late winter onwards, with exact timing depending on your geographical area, and the weather conditions in any given season.

Evergreen grasses: Longer lived evergreens such as acorus, many carex, ophiopogon and liriope may not need any attention for some years. Shorter lived evergreens such as anemanthele, some carex, festuca and nassella will need a little more regular attention, some annually, some every other year or so. Most evergreens can be trimmed when required but this should be done only when the grasses are in active growth – and not when dormant.

Many evergreens including the often variegated foliage of the sedges, such as Carex Feather Falls, might not need any attention for some years.

Semi-evergreen grasses:  These include grasses such as elymus and sesleria which may remain virtually evergreen in warmer and drier climates, but tend to perform better in the UK climate for an annual trim, to within a few inches of the ground, in early spring.

Cutting grasses can be done by a variety of different tools as seen here. None are really better than the others so it is a question of personal convenience though with larger areas mechanical or electrical trimmers do make the job quicker!

For more information take a look at our recently updated gallery How to Care for Grasses – which is intended as a practical guide, with pictures, to help you get the best out of your grasses.

After the annual cut back of deciduous grasses, and perennials, it is not long before the new growth covers the ground in fresh green spring foliage – such as with Molinia Overdam and Sanguisorba Ruby Red seen here growing in the Dragon Garden.

Hakonechloas are amongst the first of the grasses that we cut down each year as they start into growth relatively early. The hakonechloa macra that we have in pots on our driveway for example have now been cut down, divided and re potted in readiness for healthy lush growth this spring.

Hakonechloas are amongst the first of the grasses to be cut down each spring, with our driveway pots of Hakonechloa macra having been cut down, divided and repotted during the middle of February.

For more information take a look at our recently updated gallery How to Care for Grasses – which is intended as a practical guide, with pictures, to help you get the best out of your grasses.