Growing Tomatoes in Cinder Blocks: A Clever Container Method

An Innovative Way to Garden in Small Spaces

Using concrete cinder blocks as planters for tomatoes is a space-efficient, well-draining technique that works surprisingly well. The method: stand blocks on end, fill the cavities with compost or quality potting mix, plant tomatoes in the holes, and let roots grow down into the soil beneath.

Why It Works

• Excellent drainage: Open bottom prevents waterlogging
• Root depth: Roots access native soil below for moisture and nutrients
• Thermal mass: Blocks warm early in spring and hold heat
• Air pruning: Roots reaching block edges are air-pruned, promoting fibrous growth
• Weed reduction: Elevated planting surface minimizes weed pressure

Tips for Success

• Use indeterminate varieties with stakes or cages inserted at planting
• Fill holes with 50/50 compost and potting mix
• Water consistently—blocks dry faster than in-ground beds
• Fertilize regularly with balanced tomato feed
• Place on landscape fabric or gravel to keep area tidy

This method is especially valuable for gardeners with poor soil, limited space, or mobility issues—blocks can be arranged at comfortable working height.