13 Secret Tips for a Dense Zinnia Bed (Without Crowding Your Plants)

9. Perform Clean Center-Canopy Clearing

The Dark Inner Swamp

I used to think that the more leaves my plants had, the healthier they were, so I just let them grow completely wild. But one summer, I parted the branches of a massive, beautiful zinnia bush and was absolutely horrified by what I saw hiding inside.

The entire center of the plant was a dark, tangled mess of yellowing, dying leaves that looked like a tiny, sad swamp. Because I had focused so much on getting that lush, dense outer look, I had accidentally blocked all the sunlight from reaching the core of the plant.

Those trapped interior leaves couldn’t photosynthesize at all, so the plant was just slowly aborting them while completely restricting crucial air circulation. It was basically a perfect, humid little breeding ground for every fungal spore you can imagine.

Opening the Sun Roof

To keep your plants incredibly thick on the outside but actually healthy on the inside, you have to practice selective inner pruning. I like to call this opening the sun roof, and it will completely transform your zinnia care routine.

Once your plants get nice and bushy, take your sharp snips and carefully thin out the oldest, most crowded leaves right in the dead center of the main stalks. You definitely do not want to strip the interior branches completely bare, but you must remove enough foliage so that you can clearly see dappled sunlight hitting the dirt when you look straight down from the top.

This simple bit of proactive foliage care keeps the core of the plant totally dry and breathes fresh air right into the densest parts of your canopy.

But even with the center fully cleared out, your densely packed plants are still incredibly vulnerable if their bottom leaves are constantly resting on wet dirt, so go ahead and hit that next button below and I’ll show you the exact height you need to strip those lower stems!