23/06/2021
This is a Gazania. It is an annual that one of my clients loved to plant in her front door flower bed. Its bright, requires pretty much zero maintenance and attracts butterflies. One summer I noticed that a few of them weren't looking so hot, so I investigated further. When I tried to deadhead and remove dead leaves off a few, whole plants would pop out of the ground with the slightest tug on a leaf. Crown rot. Also there was a whitish coloration to the leaves. These were a sure sign of fungal infection. These annuals prefer well draining soils and dry conditions, but the soil they were growing in was very damp. Not only that but, as I discovered, there were two or three plants all grouped together very closely.
Often, when a grower seeds trays of annuals, they expect that not all the seeds will germinate, so they put more than one seed in a cell to make sure that cell grows at least one plant. If a cell is empty the garden center consumer will not likely buy a six pack with one or two empty cells. If a six pack has an extra seedling well all the better, a consumer thinks. However when two or three seedlings are growing in a single cell, they compete for water and nutrients. That's fine for the short time they may spend on the garden center tables, but after a few weeks this forces the plant to go to seed and senesce faster. After a few weeks, most seedlings reach a point of no return--even if one were to plant them in a roomy garden bed with healthy, moist soil, they would still simply just go to seed and die after just a few flowers.
Back to my clients garden. They were healthy and strong when she bought them, however when she planted them she didn't pull apart the two or three seedlings that were growing together in one cell. Which means they were still competing for nutrients and growing space. The crowded conditions lacked airflow and moisture lingered on the leaves to the point where they developed fungus and started to rot all the way down to the crowns.
This anecdote illustrates just how important it is to separate annuals seedlings and space them appropriately (depending on the species) when planting them. This will help them to grow full, flower adequately, and stay healthy for the whole season. Happy planting!