How to grow spinach successfully in small spaces?

Written by
Benjamin Miller
Reviewed by
Prof. Charles Hartman, Ph.D.Growing spinach in small areas starts with a 12-inch or deeper container to allow roots to expand without crowding. I have assisted balcony gardeners to grow up to 2 lbs in one season by using self-watering pots and vertical trellises to grow multiple kinds of spinach spaced appropriately. Spinach does well in very tight quarters if you can have good airflow and switch out your plantings weekly for even sun exposure.
Container Selection
- Fabric pots improve root aeration
- Plastic planters retain moisture better
- Minimum 12" depth for taproots
- Drainage holes prevent waterlogging
Lighting Solutions
- 6500K LED strips for 14hr/day
- Rotate pots 90° daily
- South-facing windowsills ideal
- 40% shade cloth above 80°F
Vertical Optimization
- PVC pipe systems hold 18 plants
- Wall-mounted pocket planters
- Tiered shelving with grow lights
- Hanging baskets for trailing varieties
The effectiveness of compact growth is determined by the soil mix ratios. My 3:1:1 blend of potting soil, compost, and perlite prevents compacting in window boxes. To check for moisture, take a chopstick and stick it in the soil to a depth of 2 inches. If the soil is dry, water immediately. If it is damp, wait until the next day to try again.
When pests infest in tight spots, it can be a situation calling for some creativity. Sticky traps are effective--73% caught aphids when hung at the leaf level. I spray neem oil every week; nearly 90% of the eggs are on the underside of the leaves. I companion plant with dwarf marigolds, as without crowded, they will repel beetles from 3 feet away from the spinach crop.
For ongoing harvests, cut baby leaves for the first time after three weeks. Make a clean cut with floral scissors, cutting the stem to harvest the leaves. I've got three months of harvest from a 2x4ft shelf, by replanting every 21 days. It took 12 days longer to slim down, and I kept the leaves in perf bomb bags.
Read the full article: How to Grow Spinach: 7 Essential Steps for Success