Why do container plants need special fertilizer?

Container plants require special fertilizers because the soil in which their roots grow is so limited; nutrients are soon depleted. There is no replenishment from the surrounding earth as there is for garden beds. Watering leaches minerals out, so for the best results, container plants must be regularly fed to remain healthy, vigorous, and productive throughout the summer and autumn.

Leaching plants to remove excess salts Excessive fertilization will create a salt crust on top of the soil. This crust actually draws moisture from the roots, causing them to become dehydrated. Leach the container at least once a month by running water completely through until it flows freely from the drainage holes. This process will not harm the roots and will keep a good balance of nutrients in the soil.

Seasonal adjustments maximize feeding. Spring growth requires high-nitrogen formulas. Switch to high phosphorus with flowering. Stop fertilizing 6 weeks before the first frost to harden plants. Start again in the spring when new growth appears.

"My tomatoes doubled in production the year I started using container fertilizer. The plants turned yellow mid-season, regardless of how often I watered them. I now add slow-release granules to the soil when I plant and then feed the plants with liquid fertilizer every other week while they are setting fruit. They stay bright green until frost."

Organic approaches, such as compost tea, deliver plant nutrients gently without the risk of salting out the plant. To make compost tea, use one part compost to five parts water in the brew. Apply weekly as a soil drench. These natural solutions provide essential nutrition while also promoting microbial activity in the soil, allowing plants to receive nutrients in a slow and continuous manner.

Read the full article: 10 Essential Container Gardening Tips for Beginners