Regular potting soil mixed with perlite and peat is a perfect medium for geranium care. Hot Weather. Reduce the frequency of watering to once every two weeks during fall until the plants begin to die back, and then cease watering. How Often to Water Geraniums? But, as with any plant, you have to careful not to overwater—the roots should never sit in standing water. While geraniums are robust and often grow without a care in the world, they can be attacked by caterpillars, which may chew on the leaves or put holes in the buds. Water the plants when the potting soil feels slightly dry to the touch. Rust is a disease that affects leaves, particularly on zonal geraniums. Select a pot that fits the size of the plant. Geranium roots will rot if they sit in water for an extended period of time, so adequate drainage is essential. Geraniums are quite forgiving I basically let them go dry to touch and depending on the size of the pot I calculate watering this way. “Geraniums don’t like to get their feet wet” this is something … Read more. Their soil needs to be well drained. Allow plants to dry out, trim them back and find a spot for them with excellent air circulation. The best way to do this is to use a water meter or poke a finger into the soil. How Often Should I Fertilize Geraniums? How often should I water lawn seed during germination? Whether indoors or out, geranium care is pretty basic. This allows the water to pool and then gently filter down through the soil. This ornamental plant can grow up to three feet in fertile soil. Answered by Downtoearthdigs on June 23, 2015. If the weather is hot, or you live in an arid climate, check your geraniums often. OLLIE. Geraniums are considered relatively drought resistant, but that doesn’t mean you should never water them. Care of Geraniums. Alternatively, apply a liquid 20-20-20 fertilizer in the spring, midsummer and late summer. Lv 6. You’ll want … Temperature. Geraniums like moist soil but it’s also important to let the soil dry out between watering. 2. Geraniums are often mistakenly listed as “beetle resistant.” In fact, Japanese beetles will happily eat geraniums. But geraniums are picky about one thing… They love lots of water! Water only when the soil seems dry. Let soil dry out completely between watering. Watering Geraniums Because you need to water geraniums thoroughly and deeply, take the time to leave an irrigation furrow around each plant to serve as a watering reservoir. Give plants a good short, back and sides each year in late-winter. They can be bone dry for a day or 2 without ill effects. With the recent geranium revival, it’s time to give the humble geranium a look with a fresh pair of eyes. Check containers daily during hot summer weather. Small, 1 in. Avoid overfertilizing. Let them dry out a bit between watering, but not to the extent that the soil is like a rock! Be sure to water your Geraniums thoroughly, but allow the soil time to dry (equivalent to a damp sponge) in between watering. Once perennial geraniums are established, they can usually survive on rainfall, except during severe drought. How to Hand-Pollinate Geranium Flowers (Part 1) If you are interested in hand-pollinating geranium flowers, you are at the right place. I don’t check on them during the winter and I don’t spray the roots with water, as I’ve read in other tutorials. 2. The geraniums … Watering. Relevance . Replenish the mulch as often as necessary to keep it 6 inches thick. To prevent this, water only when the top inch of the potting mix is dry, and make sure that moisture can easily drain away through holes in the pot. Probably a sign of too much water: geraniums like it hot and dry – think Italian window boxes! They don't even wilt easily. 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