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Heated Greenhouse Table
Heated greenhouse tables serve two main purpose on the small market garden veggie farm. First, it offers a place with a fairly constant temperature to ensure high germination rates. Not too unlike the Sweat Box Germination Chamber (http://farmhack.org/tools/sweat-box-germination-chamber), However, this tool allows us to continue growing the seedlings under optimal conditions until they get a bit stronger. Secondly, we can get some onion plants out to the greenhouse to free up room in our seedling room. We start onions and greenhouse tomatoes under lights in the basement, then move them out to the greenhouse when we are ready to start heating the greenhouse/nursery.
Low-cost mobile hoop house
Moveable 16' X 48' Hoop house compatible with year-round vegetable growing rotations as described in "The Four Season Harvest" and elsewhere that is large enough to be useful but small enough to be constructed on farm with basic tools and easily sourced materials. Hoop house uses multiple independent wheel assemblies during moves that enable one or two persons to move the house manually.
Pedestal greenhouse or general-purpose table
Straight table legs get in the way and are fragile without lots of bracing. A pedestal base with 45 and 30/60 geometry uses 40% less lumber than a 6-legged table, is self-adjusting on un-level ground, and is much stronger than a 6-legged table (and MUCH stronger than a 4-legged table!). It uses a combination of tension and compression to keep the table top from deforming under load. It allows tables to be placed closer together, as a wheelbarrow can run between tables beneath the table top.
Cold Frame with Recycled Windows
Use salvaged windows and materials to construct a mini-greenhouse for season extension. These cold frames can be used to warm soil before planting directly in the ground, create a micro climate for seedlings and starts, overwinter dormant plants, and more.
Sweet Box Germination Chamber V2.0
A "sweat box" style germination chamber built using readily available parts and a broken chest freezer that provides humidity and temperature control. Early season germination can be inconsistent without a closely controlled environment for starting seeds. Commercial greenhouses use similar systems but the cost can be prohibitive for the small vegetable grower. This is a branch of the first version posted to Farm Hack (http://farmhack.org/tools/sweat-box-germination-chamber)
Seed Germination/Early Growth Chamber
A seed germination chamber using a broken upright freezer. I got the idea from DGrover's "Sweat box" Germination Chamber: http://farmhack.org/tools/sweat-box-germination-chamber. I added onto their design by adding lighting, air circulation, a heat source and temperature/humidity gauges. This is a functioning concept that is being tested right now, and there are still issues to work out. Such as preventing excessive temperature and humidity levels as well as other concerns. So far the expense is about $150 (not including cost of freezer), nominal compared with a manufactured growth chamber, thus enabling small farmers/gardeners the ability to reliably start quantities of seeds early and extend their season.
Poly Tunnel/Hoop House Wall Support
This solution is the most simple, effective, and inexpensive way to raise and lower your poly tunnel walls.
Horto domi- RobotGardener
An Open Hardware Raised Bed Gardening Platform with Web-Interface through Arduino.
Roll Top Greenhouse Bench
In the winter and early spring, seedlings in the greenhouse need extra protection from frost. Bench heating systems can provide the necessary bottom heat but without covering the bench, much of the heat is lost. Farmers typically cover their benches with agricultural fabric, plastic, or both but putting this plastic on and taking it off daily is cumbersome and takes time. This roll top system enables one person to quickly cover or uncover the heated bench.
Sweat Box Germination Chamber
A "sweat box" style germination chamber built using readily available parts and a broken chest freezer. Early season germination can be inconsistent without a closely controlled environment for starting seeds. Commercial greenhouses use similar systems but the cost can be prohibitive for the small vegetable grower.