Obinrin Farms State-Level Plant Hardiness & Planting Performance Pilot — Kaduna State

On the 1st of February 2026, our research fellow at Kaduna State University sowed six crops into the ground with a simple question in mind: what actually grows well here? Not in a seed catalog written for a different climate — but here, in Kaduna's Northern Guinea Savannah, under its heat, its rains, and its dry stretches.

Twenty-five weeks later, on the 31st of July 2026, the trial closed. Here's what six plants taught us.

The Lineup

Oregano, dill, lettuce, spinach, carnation, and zinnia — three edible herbs and vegetables, two ornamentals, one wildcard. Each was tested using direct sowing, paper-towel germination, and warm-water pre-soaking, then grown on in pots, trays, and a hydroponic system, so we could compare not just if something grew, but how best to grow it.

The Winners

Lettuce (Grand Rapids) — Score: 4/5 Lettuce almost didn't make it. Direct sowing failed outright. It took a warm-water soak to coax it into germinating — but once it did, it never looked back. Regular harvests, a starring role in salads, and a lesson in resilience: a wilted lettuce leaf isn't dead, it's just thirsty. A short soak in cold water and it perks right back up. By the study's final weeks it had gone to seed, which is exactly what a healthy lettuce plant is supposed to do at the end of a full life cycle. Verdict: highly recommended, and a genuinely great crop for beginners — low technical skill required, just consistency.

Oregano — Score: 4/5 Fast out of the gate (germinating within days) and the first crop to reach harvest. Five leaves, dried into tea, turned out to be shockingly potent — "a very strong scented tea even in small quantities," as the field notes put it. The one hard lesson: oregano rewards a light touch. Our pot-grown plant was harvested a little too enthusiastically and didn't recover. One plant goes a long way — harvest sparingly, and it'll keep giving.

The Cautionary Tale

Carnation (Chabaud Giant) — Score: 3/5 Carnation had the strongest germination rate of the entire trial and healthy leaf growth for months. But it never budded — not once, across 25 weeks, despite a deliberate stress treatment designed to trigger flowering. The answer only became clear in the trial's final week: carnations simply don't tolerate Kaduna's 30°C+ days. It's a plant that wants to be here, and almost gets there, but not without help. Recommendation: only attempt carnation in Kaduna with a temperature-regulated greenhouse.

The Ones That Didn't Germinate

Dill, spinach, and zinnia recorded zero germination, across every method tried, for the entire 25-week study. That kind of consistent, total failure — across three different techniques and, in some cases, multiple sowing attempts — points less at Kaduna's climate and more at the seed stock itself. As our final report put it plainly: "seed quality testing is very important by manufacturers or wholesalers to ensure a certain percentile of germination." Sometimes the most useful finding is knowing what to test differently next time.

Along the Way

No field trial runs without a few surprises. A hailstorm damaged the greenhouse roof mid-trial; the same weak spot later triggered a hydroponic nutrient-dosing failure during heavy rain, costing us hydroponic stock we'd worked hard to establish. It was a reminder that infrastructure resilience matters just as much as plant biology — a lesson that will shape how future trials are set up.

What's Next

This wasn't just a season of growing — it was 25 weeks of disciplined, weekly data collection: field notes, photographs, germination logs, and performance scorecards for every single crop. That dataset now feeds directly into Obinrin Farms' official state-level planting performance report, and into recommendations for growers across Kaduna.

The short version, for anyone planning a Kaduna garden this season: start with lettuce and oregano. They're forgiving, productive, and beginner-friendly. Carnation is possible, but only behind glass. And if you're set on dill, spinach, or zinnia — start with better seed.

Access the Complete Research Report

This article provides a summary of the findings from the Obinrin Farms State-Level Plant Hardiness & Planting Performance Pilot.

The complete technical report—including detailed methodology, weekly observations, crop performance analyses, photographs, and additional research findings—is not publicly available.

To support the continued funding of independent agricultural research in Nigeria, the full report is available through commercial licensing and institutional access.

If you're a university, agricultural business, government agency, NGO, researcher, or commercial grower interested in accessing the complete report or discussing research collaborations, please contact Obinrin Farms. [obinrinfarms@gmail.com]

Every report purchased helps fund future agricultural research across Nigeria.

A huge thank-you to our Research Fellow, Celi Lab, for 25 weeks of meticulous fieldwork, and to Kaduna State University for their academic supervision throughout the pilot.