Farm trial

Rabbit urine: at exactly what dilution?

Three dilutions tested as a foliar treatment on plot P-02, across a full season. One worked, one did nothing, and one scorched the leaves in a single morning.

Rabbits in the hutch around the feeder.

Rabbit urine is the worst-documented input on our farm. Everyone talks about it, everyone gives a different rate, and almost nobody says what happens when you get it wrong. So we spent a full season settling the question, on three blocks of plot P-02, with plants of the same age from the same seed lot.

The protocol

Urine collected under the hutches, fermented for twenty-one days in a closed drum, filtered through fine cloth. Three blocks of twenty plants, sprayed every three weeks at the end of the day, on both leaf surfaces. A fourth block, the control, got clean water only.

BlockDilutionEffect on foliageVerdict
A1 : 5Marginal scorch on young leaves from the first applicationDropped
B1 : 10Deeper green, thicker leaves, no scorchKept
C1 : 20Barely visible difference from the controlToo weak
Controlclean waterNormal growth

What went wrong

Block A is the main lesson of this trial. One part urine to five parts water, on young foliage, produced marginal necrosis visible by the next morning. We had sprayed in mid-afternoon, while direct sun was still on the plot — evaporation concentrated the liquid on the leaf and burned it.

The correctionSince then, no spray goes out before the sun has left the plot, and 1 : 5 is reserved for soil drenching, never for foliage.

What we apply now

  • Mature plants, foliar: one part in ten, every three weeks.
  • Young plants, foliar: one part in twenty — tender foliage takes no more.
  • Soil drench: one part in five, every two months, alongside the compost.
  • Complete stop twenty-one days before the plot’s first harvest.

We did not measure a statistically solid yield difference between block B and the control over a single season — the sample is too small for that, and we will not pretend otherwise. What we did observe, however, is clear: thicker, greener foliage, and markedly fewer mealybugs in the leaf axils.

Related reading

What next

A question, a volume, a visit?

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