A greenhouse or cold frame earns its keep only when it is always planted: grow in raised or ground beds you can reach from the edge, sow a fresh batch of salad crops every 2-3 weeks, and manage pests and disease through ventilation, spacing and screens rather than by letting problems build. A bed sitting empty wastes the sunlight it collects.
Growing systems are the beds, schedules and plant-health routines that decide what a protected growing space produces through the year.
Planting Is The Part That Uses The Structure
A greenhouse changes what you can grow and when. Winter crops in mild climates need no supplemental heat: lettuce, spinach, mâche, claytonia, kale, chard, Asian greens, small radishes and turnips, and herbs such as cilantro, parsley and chives. In spring, a hotbed or heated house starts tomato, pepper and eggplant seedlings, brassica and onion starts, and flowers for the garden. In summer, a short-season climate can ripen heat-lovers such as tomatoes, peppers, melons and cucumbers, with the vents open fully so the house acts as a rain shelter and wind block.
Three tools keep it productive. Beds give you a layout you can work. A sowing schedule keeps harvests continuous. A pest routine protects the crop in an environment that favors pests as well as plants. Each has its own page: Raised Beds & Ground Beds, Succession Planting Schedules and Pest & Disease Management.
What You Need
- Beds laid out for edge access and walkways
- Seed and a calendar, so sowings are scheduled, not remembered
- A routine — daily looks at the underside of leaves, and a logged record of what was sown when
- Compost and mulch — see Composting Basics
Method: Set Up A Protected Garden
Step 1: Lay out the beds. Mark beds narrow enough to reach across and paths just wide enough to work.
Step 2: Pick crops for the season. Choose from the winter, spring and summer lists above and keep a note of what grew well.
Step 3: Schedule sowings. Plan a new batch of greens every 2-3 weeks so that as one finishes, the next is ready.
Step 4: Inspect and ventilate daily. A daily walk-through catches pests early, and daily venting keeps humidity and disease down.
Common Mistakes
- Leaving beds empty — every empty square meter is wasted solar energy.
- Sowing everything at once — it all ripens together, and half spoils.
- Never rotating — see Crop Rotation for why a protected bed still needs it.
What’s Next
- Learn next: Raised Beds & Ground Beds — laying out the soil
- Combine with: Companion Planting — crop pairings that suit a small space