A Fall Brassica Breakdown + Can I Use My Rinse Water to Irrigate

Episode Overview

• This episode of Growers Daily focuses on a comprehensive breakdown of fall brassicas, categorizing them by season length to help growers optimize planting times.
• Host Jesse Frost explores greywater recycling systems for produce washing, discussing the risks of plant pathogen transmission and methods to mitigate them.
• The episode features farm updates from other growers, highlighting real-world challenges like pest pressure on brassica crops and transition strategies.
• This content is highly relevant to market gardeners and homesteaders looking to establish a successful fall brassica harvest and implement water conservation practices.

Key Concepts

• Categorizing Fall Brassicas by Maturity Time: Brassicas can be grouped into long-season (e.g., Brussels sprouts, cabbage, cauliflower), semi-long-season (e.g., kale, kohlrabi, Napa cabbage), and fast-season crops (e.g., radishes, salad turnips). Understanding these windows is essential for scheduling plantings to ensure crops mature before daylight decreases and hard frosts set in.
• Pathogen Mitigation in Water Recycling: When recycling vegetable wash water for irrigation, filtration and sanitization are crucial. While simple sediment removal prevents irrigation clogging, advanced systems utilize charcoal filtration and UV sterilization to neutralize potential plant pathogens and nematodes.
• Pest and Heat Protection for Young Brassicas: Planting fall brassicas in the heat of mid-summer requires protective measures. Utilizing insect netting from day one prevents pest damage from moths and beetles, while combining it with 30% shade cloth helps mitigate extreme heat stress on young transplants.
• Intercropping with Cover Crops: Under-sowing established brassicas with a cover crop like crimson clover creates a living mulch that protects the soil, suppresses weeds, and seamlessly transitions the bed into a winter cover crop after the brassicas are harvested.

Quotes

• At 2:08 - "There are really three main categories of fall brassicas: long season, semi-long season, and fast as all get out." - Explaining the seasonal categorization framework used to plan fall plantings.
• At 8:51 - "The last piece of the puzzle could be sanitation... considering some sort of UV treatments, perhaps, to help sterilize the water before it heads back out into the fields." - Highlighting the importance of sanitizing recycled wash water to prevent the spread of disease.
• At 15:26 - "The slower that the crop grows compared to the other versions of itself, the longer it will store." - Clarifying a general rule of thumb for determining the post-harvest storage potential of brassica varieties.

Takeaways

• Start your long-season brassicas (like Brussels sprouts and storage cabbage) early in summer, especially in northern zones, to allow sufficient time for them to size up before winter.
• If recycling produce wash water, route the greywater to wood chip piles for composting as a low-tech, bio-sanitized alternative to complex filtration systems.
• Use a flame weeder or stale seedbed technique to manage weed pressure before direct-seeding slow-germinating fall root crops like rutabagas.