Wondering if your chosen spot for planter boxes gets enough light? It's a crucial question for urban gardeners. Don't worry, you don't need special equipment. Start by observing the area over a full day. Notice where shadows fall from buildings, fences, or trees. The simplest method is the "hand shadow test." On a sunny day, place your hand where the planter will go. A crisp, well-defined shadow means full sun (6+ hours). A fuzzy shadow indicates partial sun (3-6 hours). No real shadow suggests mostly shade.
For more precision, track sunlight hours. Mark the time when direct sun first hits the spot and when it leaves. Do this for several days. You can also use a compass; south-facing locations (in the Northern Hemisphere) typically receive the most intense light. Modern technology helps too. Smartphone apps like Sun Surveyor or Photone can model the sun's path and measure light intensity.
Finally, match your findings to your plants' needs. Seed packets or plant tags list requirements like "full sun," "partial shade," or "full shade." Remember, light changes with seasons. A spot sunny in summer might be shaded in winter. Regular observation is your best tool to ensure your urban garden gets the light it needs to flourish.