Dry Farming Demonstration and Value-Added Use of Hibiscus (Roselle), Loofah, Butterfly Pea, and Saffron for Small Farms in Alabama’s Black Belt

Commodities

Practices

The proposed solution is to develop, test, and document a practical dry-farming specialty crop system that relies entirely on natural rainfall, soil-cover strategies, and simple moisture monitoring, combined with full-plant utilization to create profitable value-added products. This project provides a complete model-from field trials to processing to consumer education-that small farmers in Alabama's Black Belt can replicate without irrigation or high capital investment.

1. Production Trials

The project will use a farmer-led experimental design to compare two dry-farming soil-cover systems-landscape fabric and mulch-for roselle, loofah, and butterfly pea. Each crop will be grown in six randomized plots (three fabric, three mulch) to measure survival, bloom timing, labor requirements, and yields under natural rainfall. Saffron, which requires different cultural conditions, will be grown in milk crates placed on recycled pallets with insect mesh protection. This crate system improves drainage on clay soils and allows for easy moisture monitoring and bulb multiplication.

Together, these trials generate real-world data on how drought-tolerant specialty crops perform under non-irrigated conditions in Black Belt clay/prairie soils, which retain moisture exceptionally well when shielded from evaporation.

2. Soil Moisture Monitoring

To quantify the performance of each production system, soil moisture will be monitored weekly using simple handheld probes at permanently marked sampling locations in the fabric, mulch, and saffron-crate treatments. Values will be averaged, logged, and transferred monthly to a master sheet. These data will demonstrate how quickly each system dries after rainfall, how long the soil remains workable for roots, and which treatments conserve moisture most effectively. All moisture data will be incorporated into the monthly updates of the project's open-access online course.

3. Value-Added Uses for Hibiscus, Loofah, Butterfly Pea, and Saffron

A defining feature of this project is full-plant utilization. Biomass that would normally be discarded becomes a revenue source:

• Roselle Compost Blend: Roselle stalks, loofah vines, and seed pods will be shredded, composted for 6-9 months, and lab tested for nutrient content. This specialty compost will be positioned as a premium, small-batch soil amendment, with on-farm trials demonstrating how hibiscus biomass can be converted from waste into a marketable product.
• Dried Loofah Sponges: Mature loofah will be peeled, washed, sun-dried, and packaged as natural cleaning and bath products.
• Dried Butterfly Pea Flowers: Flowers will be harvested and dehydrated for herbal tea, edible colorant, and specialty beverage uses.
• Pilot-Scale Saffron: Flowers will be harvested, stigmas removed by hand, and threads dried and stored in small vials. While saffron will remain small-scale in Year 1-2, corm multiplication offers long-term expansion potential.

All four crops also generate saleable planting material. Roselle, loofah, and butterfly pea produce abundant seed for low-cost packet sales, while saffron crates multiply corm offsets annually. These seeds and seedlings provide an additional revenue stream that requires minimal processing and aligns with small-farm enterprise budgets.

4. Consumer Education and Market Testing

To build demand for these crops and their products, the project will incorporate public-facing education:

• A farmers-market exhibit will display dried tea, loofah sponges, compost bags, saffron, and fresh plant materials.
• Field days will demonstrate how dryland systems function, how mulch vs. fabric affects moisture, and how specialty crops can be processed into value-added goods.
• A year-round online course, updated monthly, will share field data, moisture charts, processing demonstrations, and downloadable extension-style materials inspired by Tuskegee's George Washington Carver Experiment Station bulletins.

This combination of hands-on and digital outreach ensures that the project benefits both local community members and distant farmers seeking guidance on drought-resilient specialty crops.

Project Objectives

Objective 1: Demonstrate dry-farming production of roselle, loofah, butterfly pea, and saffron on Black Belt clay/prairie soils using natural rainfall only.
Objective 2: Compare landscape fabric and mulched beds for moisture retention, plant survival, bloom timing, labor, and yields.
Objective 3: Evaluate the feasibility and productivity of crate-grown saffron under insect mesh protection.
Objective 4: Produce and test four value-added products:
• Roselle Compost Blend
• Dried Loofah
• Dried Butterfly Pea (Herbal Tea)
• Dried Saffron Threads (pilot-scale)
Objective 5: Share findings through field days, farmers-market exhibits, a year-round online course, and published extension-style materials.

Evaluation Plan

Project success will be evaluated using clear, measurable indicators:

• Soil moisture comparisons across fabric, mulch, and crate systems
• Survival rates for roselle, loofah, butterfly pea, and saffron
• Yield data, including roselle calyx pounds, leaf yield, loofah sponge count, butterfly pea flower quantity, and saffron grams
• Compost nutrient analysis from Auburn University Plant Lab
• Profit projections for each value-added product
• Online course engagement, including views and downloads
• Field day attendance and participant feedback
• Farmers-market booth engagement, tracked through QR scans and conversations
• Completion of the final SARE report summarizing all results and practical recommendations

These evaluation metrics ensure that the project provides transparent, meaningful results that can be replicated by other small farmers seeking sustainable, low-input specialty crop systems.

The methodology for this project integrates farmer-led field trials, a randomized block design (RBD) comparing two soil-cover systems, weekly soil-moisture monitoring, value-added processing of crop biomass, and educational outreach. The goal is to provide a practical dry-farming model that small farmers in Alabama's Black Belt can replicate without irrigation.

1. Field Trials Overview

All crops except saffron will be greenhouse-started for uniform establishment and transplanted to the field in spring after the last frost. The project uses one unified Randomized Block Design (RBD) to test how landscape fabric versus mulch affects soil moisture, plant survival, bloom timing, labor, and yields for roselle, loofah, and butterfly pea. No cover crops will be used in this study.

Saffron will be evaluated through a separate crate-based pilot system, which is appropriate given its unique agronomic requirements. Additional non-experimental roselle, loofah, and butterfly pea will be grown in separate production areas to support value-added processing, harvest demonstrations, and educational materials.

2. Experimental Crop Systems and Plot Setup

A. Roselle (Primary Crop - Randomized Block Design)

• Six plots total: 3 landscape-fabric plots and 3 mulched plots
• Plot structure:
  • Each plot contains three rows
  • Each row has five plants (15 plants per plot)
• Total plants in RBD: 90
• Data collected: survival %, calyx yield, leaf yield, biomass weight, bloom timing
• Additional roselle grown outside the RBD will supply biomass for compost production.

B. Loofah (Companion Crop - Randomized Block Design)

• Six plots: 3 fabric, 3 mulch
• Plot structure: three rows × five plants (15 per plot)
• Total plants in RBD: 90
• Spacing: based on best-practice spacing for trellised loofah
• Data collected: fruit count, sponge yield, labor hours
• Non-experimental loofah will be grown for additional sponge harvest and processing demonstrations.

C. Butterfly Pea (Companion Crop - Randomized Block Design)

• Six plots: 3 fabric, 3 mulch
• Plot structure: three rows × five plants (15 per plot)
• Total plants in RBD: 90
• Spacing: follows recommendations for vining varieties grown for flower harvest
• Data collected: flower yield (for tea), survival %, labor
• Supplemental plantings will provide additional flowers for value-added processing.

D. Saffron (Pilot Crop - Crate System, Not Part of RBD)

Saffron requires a different production environment, therefore it will be grown using a crate-based model.

• Corms planted in milk crates set atop recycled pallets
• Landscape fabric beneath pallets for weed suppression
• Insect mesh installed to protect delicate stigmas
• Year 1: corm multiplication
• Year 2: grams of dried saffron threads harvested
• Data collected: flower count, stigma yield, moisture stability of crate system

This pilot provides insight into whether small-scale saffron production can fit within a dry-farming specialty crop system.

3. Soil Moisture Monitoring (Manual, Weekly)

To quantify water efficiency across systems, soil moisture will be recorded weekly using handheld soil-moisture probes at fixed sampling points.

Procedure

• Permanent flags mark each sampling spot (e.g., H-F1, H-M1, L-F1, BP-M1)
• Probe inserted at 4-6 inches (root zone)
• Two readings taken and averaged per location
• Readings taken on the same day and time weekly after dew evaporates
• Notes include rainfall timing ("24h after rain")
• Data recorded on paper/phone, transferred monthly to a master sheet

Monitoring Locations

• One designated roselle/loofah/butterfly pea plot under landscape fabric
• One designated roselle/loofah/butterfly pea plot under mulch
• One sampling point within the saffron crate system

Moisture trends will be used to evaluate the relative water-holding performance of each treatment and to create simple charts for outreach materials and the final SARE report.

4. Value-Added Processing and Biomass Utilization

The project integrates full-plant utilization to demonstrate how low-input crops can generate multiple revenue streams.

A. Roselle Compost Blend (1-lb bags)

• Roselle stalks and seed pods shredded
• Combined with shredded loofah vines
• Composted for 6-9 months
• Nutrient profile tested by Auburn University Plant Lab

B. Loofah Sponges

• Mature gourds peeled, washed, sun-dried
• Packaged for sale as bath or cleaning products

C. Butterfly Pea Herbal Tea

• Flowers harvested and dehydrated
• Packaged in eco-friendly pouches

D. Saffron (Dried Spice)

• Flowers harvested
• Stigmas removed by hand
• Threads dried and stored in small glass containers

All four crops generate saleable planting material as well-roselle, loofah, and butterfly pea produce abundant seed, and saffron crates produce additional corms.

5. Outreach, Demonstration, and Knowledge Transfer

Results will be shared through:

• Two field days demonstrating fabric vs. mulch performance, moisture retention, and value-added processing
• A farmers-market exhibit showcasing dried tea, loofah sponges, compost, saffron, and fresh plant materials
• A year-round online course, updated monthly with field photos, moisture data, yield summaries, and processing tutorials
• Extension-style handouts modeled after George Washington Carver Experiment Station bulletins

This multi-channel approach ensures farmers, students, consumers, and community members gain practical, accessible information on drought-tolerant specialty crop systems.