The Complete Beginner Guide to starting seeds indoors

Starting seeds indoors is one of the most easy things you can do in a small space garden. This spring, it is the perfect time to seed starting. Starting from seed gives you far more variety and far lower costs. Here is the complete beginner guide to starting seeds indoors.

Light Requirements

Most edible plants need at least 6 hours of direct sunlight daily. South-facing windowsills and balconies get the most light in the UK. If your space gets less than 4 hours of direct sun, focus on leafy greens and herbs which tolerate partial shade. For year-round growing regardless of natural light, an LED grow light running 14-16 hours daily replaces sunlight entirely.

Common Problems and How to Fix Them

Yellow leaves usually mean overwatering or nutrient deficiency — check drainage first, then consider a balanced liquid feed. Leggy seedlings are reaching for light — move them closer to a window or add a grow light. Aphids cluster on new growth and can be blasted off with a strong spray of water. Blossom end rot on tomatoes comes from inconsistent watering — maintain even moisture and the problem stops.

Getting Started with starting seeds indoors

The best way to start with starting seeds indoors is to focus on the basics first. Choose the right container size for your space, use quality potting mix with good drainage, and place your setup where it gets the most light. Most beginners try to do too much at once — start with one or two plants and scale up once you see results.

Quick Tips for Success

• Perlite mixed into potting soil improves both drainage and aeration.
• Add a thin layer of mulch on top of container soil to reduce water loss.
• Harvest herbs from the top down — cutting the stem tips promotes branching.
• Succession sow salad greens every 2-3 weeks for a continuous supply.
• Use pot feet or risers under containers to improve drainage and air circulation.