We're offering you a Super 7 Electric Propagator for £49.99, saving you up to 12% off Thompson and Morgan's's price of £56.99 (correct as of 24.02.2026).

Windowsill Gardening

Start Your Garden Indoors with the Super 7 Electric Propagator

The Super 7 Electric Propagator is designed for gardeners who want to kick-start their growing season, even when outdoor conditions aren’t ideal. With seven separate mini trays and clear lids, you can sow a wide range of seeds—herbs, flowers, vegetables, or even houseplant cuttings—all in one compact, energy-saving unit that fits neatly on most windowsills.

• Perfect for Limited Space: At just 76cm x 18.5cm, this propagator maximises your growing potential without taking over your kitchen or conservatory.
• Accelerated Germination: The integrated 15-watt heating element keeps compost at a steady 19°C—ideal for promoting strong, healthy seedling growth and reliable rooting of cuttings.
• Diverse Planting: Each of the seven mini trays can be used for different plant types, making it easy to manage sowing times and plant care requirements.
• Minimal Running Costs: Enjoy continuous propagation throughout the year without worrying about high electricity bills—the Super 7 costs only pennies per day to run.

How to Use & Care For Your Propagator

• Sowing Seeds: Fill each tray with seed compost and sow according to individual plant instructions. Cover with the clear lid to retain humidity and warmth.
• Placement: Position your propagator on a bright windowsill out of direct midday sun for best results.
• Irrigation: Keep compost moist but not waterlogged; check regularly as warm conditions speed up evaporation.
• Caring for Seedlings: Once seedlings are large enough to handle (usually after the first set of true leaves appear), transplant them into pots or your garden as appropriate for the species.
• Cleaning: Wash trays and lids between uses to prevent cross-contamination and promote healthy growth.

Ideal For:

• Sowing annual flowers such as marigolds or cosmos early in spring.
• Starting vegetable seeds like tomatoes, peppers, or cucumbers before outdoor planting.
• Nurturing herb seedlings for fresh kitchen use all year round.
• Taking cuttings from houseplants or tender perennials that need consistent warmth to root successfully.

FAQs

• Q: What types of plants can I start in this propagator?
  A: The Super 7 is suitable for most small-seeded flowers, vegetables, herbs, and houseplant cuttings that benefit from gentle bottom heat during germination.
• Q: How long should I keep seedlings in the propagator?
  A: Most seedlings should be moved on once they have developed their first set of true leaves. This varies by species but is typically within 2–4 weeks after sowing.
• Q: Does it require any special compost?
  A: Use a fine seed-sowing compost suitable for your chosen plant type. Avoid heavy garden soil or multipurpose composts that may retain too much moisture in the heated environment.