Planting the bulbs
When to plant -- Your bulbs (technically corms) will sprout in autumn, around late September or early October in the Northern hemisphere (in the South Hemisphere, late March/April). Until then, store them in a paper bag. Or you may plant them in soil, if it is kept completely dry until autumn. Either way, keep them in a cool spot until then, out of direct sunlight.
Pot size -- The pot should be about 6 inches tall (15 cm) and each bulb should be about 1.5 inches (4 cm) from the next one, and from the edge of the pot. The pot needs drainage holes. To keep the bulbs from overheating in sun, it's best to use a clay pot of a lighter color.
Soil -- This Ixia needs well-draining soil. A typical mix is 2 parts potting soil to 3 part perlite or coarse horticultural sand. An alternate mix is 1 part coir fiber or peat moss to 2 parts coarse sand or perlite. If you are in a high-rainfall area, use slightly more perlite or sand to whichever mix you use.
Planting the bulb -- To reduce the chance of rot, surround the bulb with a layer of perlite or coarse sand. The way to do this is to fill the pot to within 2 inches (5 cm) of the top with your soil mix, then lay down a thin (1/4 inch / 6 mm) layer of perlite or sand, place the bulbs on this, add some more perlite/sand until they are covered, then continue filling the pot with soil. Plant the bulb with the smooth, domed end up (the other end may have a "puckered" look - this is where the roots were attached). If you're unsure which end is "up", just plant them sideways. The top of the bulb should be about a 1½ to 2 inches (4-5 cm) under the surface.
Water the soil lightly. Use just enough water to lightly moisten the soil throughout. Until the bulbs sprout, keep them between 50 and 75 degrees F (10-23°C).
Sunlight -- Once they sprout, move them to a sunny spot. This Ixia prefers mostly-sunny conditions. I find they can tolerate less sun in winter if they receive more sun in spring. Some afternoon shade might be needed in regions of strong, hot sun.
Watering: Aim to keep the soil evenly moist throughout the growing season. Avoid letting it dry out completely, but also don't keep it soggy. You may use a moisture meter to monitor the soil moisture down at the root level. You can buy this at garden and hardware stores inexpensively. Simply stick the probe in the soil to the level where the roots are.
Feeding -- This species has relatively low fertilizer requirements, so strong fertilizers should be avoided. Feed about a month after they sprout, and again 2-3 months later, using a general-purpose, granular (slow-release) fertilizer. Avoid feeding after March.
Frost protection -- The plants must be protected from freezing temperatures. You may grow them indoors in a sunny room.
Wind protection - The grass-like leaves and flower stems are somewhat fragile and may need support in very strong winds.. or move them to a protected spot.
Dormancy care -- The biggest risk of mold is during the "senescent" period, while the leaves are dying back, which occurs after the plant has flowered in the Spring and is preparing for dormancy. Water very cautiously during this time, giving just enough water to keep the soil from becoming bone-dry.
Once the leaves have completely died back, you may remove the bulbs if you wish and separate the baby corms. Store them in a paper bag in a cool spot until autumn
Pests -- I haven't had trouble with insects, but mealy bugs are reported to like the bulbs.
Have fun growing them!
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