Join the RHS today and support our charity
Free personalised gardening advice
RHS members get reduced ticket prices
RHS members get free access to RHS Gardens
Reduced prices on RHS Garden courses and workshops
020 3176 5800
Mon – Fri | 9am – 5pm
Make a donation
I have forgotten my password
Keep me signed in
Register for free to receive our newsletters, add comments to blogs/articles and to save content.
See what events are on near you and browse your bookmarked pages.
Don’t miss out - book in advance and save
Soil cultivation or digging may be hard work but, if taken slowly, it need not be back-breaking. In fact, here we describe how it can often be omitted or at least minimised.
All bare soil is suitable for cultivating (or digging). However, digging around plants is best avoided as it damages roots and so can be harmful.
Digging is called 'primary cultivation' (and could also be carried out by a mechanical rotavator). This is followed by secondary cultivation to produce a fine seedbed, ready for sowing seed or planting.
Clay soils: are best dug in autumn, but avoid carrying out this task when the soil is wet and claggy. Autumn digging allows the frost to break up the soil over the winter, improving the structure.
Light, sandy soils: are best dug in spring. However, digging can be carried out from autumn to spring, as long as the soil is not waterlogged or frozen.
Because digging leads to moisture loss, complete it before the warm spring weather arrives.
Consider hiring a mechanical rotavator to do the cultivation for you if time runs short. Light soils can be handled by a two to five horse power model, but hard or heavy soil needs a larger model. Rotavating wet soil is extremely damaging; wait for drier conditions.
Turning over the soil to a spade’s (or fork’s) depth is called single digging.
It is worth noting that an alternative method is double digging. This involves inverting a second, deeper layer of soil. This may be hard work but it is perfect for creating new borders and deepening shallow topsoil. It can also be helpful where drainage needs to be improved or where deep-rooted, long-term plants are to be grown, such as asparagus and rhubarb.
Where digging is not practical, consider sowing and planting into undug soil. Firstly, remove the weeds either by hand, with a flamegun or with weedkiller (containing glyphosate). Loosen the soil, if necessary, with a fork or hoe. Unfortunately, really weedy ground or very hard soils are unlikely to respond well. Making narrow beds that can be worked from paths avoids treading on the soil so can be useful.
Acidifying soilClay soilsClay soils: plants forDouble diggingGardening on wet soilLime and liming soilPre-warming soilSoil typesSoil: understanding pH and testingTopsoil: buying
the RHS today and get 12 months for the price of 9
RHS members can get exclusive individual advice from the RHS Gardening Advice team.
Register for the site or sign in to share your experiences on this topic and seek advice from our community of gardeners.
We're a UK charity established to share the best in gardening. We want to enrich everyone's life through plants, and make the UK a greener and more beautiful place.
Join the RHS today and get 12 months for the price of 9