Grow Above Ground
Timber-framed beds filled and planted correctly, so roots establish above Cambridge clay from day one.
What Goes Wrong
The frame is the visible part. The fill and the planting plan are where most beds underperform.
Beds filled with topsoil alone compact and waterlog; roots stall and plants fail to establish in the first season.
A calibrated topsoil-to-compost ratio retains moisture without waterlogging and gives roots the nutrient base they need.
A frame under 250mm gives vegetable roots nowhere to go, limiting yield and forcing more frequent watering.
Vegetable beds are built to 300mm to 400mm depth so root crops and brassicas have adequate growing room.
Planting without a spacing or companion plan leads to overcrowding, poor airflow, and a bed that is hard to maintain.
A block planting layout sets species, spacing, and companions before any plants go in, keeping the bed structured and manageable.
A frame set on uneven ground causes water to pool at one end, rotting the timber and drowning plants on the low side.
Ground is prepared and checked with a spirit level; a permeable membrane at the base allows drainage without soil loss.
Scope of Work
Frame construction, fill supply, and planting are each a distinct stage, quoted separately so you can adjust scope before work starts.
Treated timber frames built to specified depth, levelled on prepared ground with a permeable base membrane.
Beds filled with a topsoil-compost mix matched to the plant type, with a soaker hose laid through the fill at installation.
Block planting scheme with species, spacing, and companion planting set out before any plants go into the bed.
Depth and fill matched to root crops and brassicas.
pH and drainage adjusted for flowering perennials.
Layouts sized for smaller Cambridge back gardens.
Drip line installed through fill at build stage.
Why Choose Us
Every survey accounts for Cambridge clay, and each stage of the work is quoted separately.
Frame, fill, and planting are each a separate line item, so you see and control the cost of every stage.
Every survey accounts for local drainage conditions, and the fill and base layer are specced to suit the ground beneath.
You get a surveyed, itemised quote, not a generic directory listing with no accountability.
You can change the size, depth, or planting scheme after the quote and before any timber is cut.
One enquiry covers construction, fill supply, and planting, no need to coordinate separate trades yourself.
The Process
Tell us the bed size, soil conditions, and what you want to grow so the right survey can be scheduled.
A site visit checks levels and drainage, and quotes frame, fill, and planting as separate items.
The frame is constructed, filled to the agreed spec, and planted to the block planting scheme in one visit.
Pricing Estimates
| Job | Typical cost |
|---|---|
| Simple raised bed | £300-£800 |
| Several raised beds | £800-£1,800 |
| Raised beds with planting | £1,800-£3,500 |
| Full planting scheme | £3,500-£6,000 |
Common Questions
Start with a layer of coarse material at the base, gravel, broken crocks, or woody debris, to aid drainage. On top, fill with a mix of topsoil and compost. Good structure at this stage determines how well roots establish and how long the bed stays productive without constant amendment.
A mix of roughly 60% good-quality topsoil and 40% compost works well for most raised beds. Avoid using garden soil alone, it compacts badly in a confined space. For containers or shallow beds, a peat-free multi-purpose compost blended with loam gives roots room to breathe and nutrients to draw on.
Most vegetables grow well in raised beds. Compact and shallow-rooted crops, lettuce, herbs, beetroot, courgettes, and most brassicas, are particularly well suited. Deep-rooted crops like parsnips and main-crop potatoes need at least 30-40 cm of soil depth to perform properly, so bed height matters for those.
Raised beds suit both equally well. Vegetables benefit from the controlled soil and good drainage. Flowers, especially cut flowers, bulbs, and perennials, thrive because roots are not competing with compacted ground. Many gardeners mix the two, using flowers to attract pollinators alongside food crops.
The main downsides are upfront cost, drying out faster than in-ground beds in summer, and limited space for large or deep-rooted crops. Timber frames need replacing over time. They also require more watering in dry spells, so a simple drip system or regular hand-watering becomes part of the routine.
For most Cambridge gardens, raised beds outperform in-ground growing where the native soil is heavy clay, compacted, or poor. You control the soil quality entirely, drainage improves immediately, and weeds are far easier to manage. On plots with naturally good, free-draining soil, in-ground growing can be equally productive at lower cost.
Avoid filling a raised bed with subsoil, builders’ rubble, or unrotted wood chippings. Subsoil lacks nutrients and compacts badly. Rubble creates drainage dead zones. Unrotted organic matter draws nitrogen away from plants as it breaks down, starving roots during the most critical growing period.
The most common mistake is making the bed too wide to reach the centre comfortably. A bed wider than 1.2 metres means stepping in to weed or harvest, which compacts the soil and defeats the purpose. Keep width to 1.2 metres maximum so every part is reachable from the side.
We cover Raised Beds & Planting in and around Cambridge, including Trumpington, Great Shelford, Sawston, Fulbourn, Histon, Cottenham, Waterbeach, Cambourne and Northstowe. If your area isn’t listed, send us a quick message to check.
Describe the plot, the soil, and what you want to grow. We schedule a ground survey and quote frame, fill, and planting as separate line items.