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Fertiliser Management: Feeding Basins & Fertiliser Timing

Coffee is a heavy feeder, especially once it starts bearing — and how you feed it matters almost as much as what you feed it. On our own farm, we lay out coffee rows with fertiliser basins and feeding basins built into the block plan from the start, intercropped with bananas. Here's the layout we use and why.

The Farm Layout

Coffee trees are planted at 10ft x 10ft (3m x 3m) spacing. Between coffee trees within a row, we mark two kinds of basin: a small fertiliser basin, a pit dug beside the plant for applying manure or compost, and a feeding basin — a shallow trench for routine fertiliser application. Bananas are intercropped between alternating rows, giving shade for young coffee and an early income stream while the coffee matures.

What a Feeding Basin Does

A feeding basin concentrates fertiliser and organic matter in the root zone where a coffee tree can actually use it, rather than letting it wash away or spread thinly across bare ground. Just as importantly, the basin acts as a water trap — it catches and holds rainwater in the soil right where the tree needs it, instead of letting it run off the surface, which is exactly why it's worth keeping the basin in good repair even between fertiliser applications. Digging the basin slightly away from the trunk (not touching the stem) protects the bark while still reaching the feeder roots, which spread laterally near the surface.

The fertiliser basin works alongside it: this is simply where the manure or compost itself goes in — a dedicated pit beside the plant, kept separate from the shallower feeding basin used for routine top-dressing.

When to Fertilise

Time fertiliser applications around the coffee calendar rather than the regular calendar:

• Early in the rains, before flowering — builds the nutrient reserves the tree needs to flower well.
• After fruit set — supports berry filling, when demand for potassium in particular rises sharply.
• After harvest — helps the tree recover and rebuild reserves for the next season's growth.

Splitting the season's fertiliser into these smaller, well-timed applications gets better uptake than one large single dose, and reduces the amount lost to leaching in heavy rain.

Manure & Compost First

Where farmyard manure or compost is available, applying it into the fertiliser basin ahead of the rains improves soil structure and water-holding capacity, on top of supplying nutrients — this is especially valuable in the first three years while a young tree is still establishing its root system.