How to Fertilize Rex Begonia
When Should I Start Feeding My Rex Begonia?
Begin fertilizing your Rex Begonia when you see new leaf growth emerging in spring, with the exact timing depending on your region's light levels and temperatures.
How Often Should I Fertilize My Rex Begonia?
During spring and summer, feed your Rex Begonia every 2-4 weeks with a half-strength liquid fertilizer. If your plant is putting out new leaves steadily, lean toward every two weeks.
In early fall, taper to once a month at quarter strength. Once winter arrives, stop feeding completely. Rex Begonias naturally slow down in low light, and unused fertilizer salts will accumulate in the soil.
If you notice white crust forming on the soil surface or leaf edges turning brown and crispy, you may be overfeeding. Flush the soil with plain water and skip the next feeding.
What Is the Best Fertilizer for Rex Begonia?
A balanced liquid fertilizer with an even NPK ratio like 10-10-10 or 20-20-20 works best for Rex Begonia. The equal parts nitrogen, phosphorus, and potassium support both the spectacular foliage color and healthy root development.
Always dilute to half the label's recommended strength. Rex Begonias have delicate, fibrous roots that burn easily from concentrated fertilizer salts.
Liquid fertilizer is the best delivery method because it distributes evenly through the soil and gives you precise control over the dose. Avoid granular slow-release formulas, which can create hot spots of concentrated nutrients near the sensitive roots.
How Do I Fertilize My Rex Begonia?
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