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Alstroemeria Planting Guide

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Flowers for Months and Months (and Months)
Alstroemeria

Alstroemeria blooms are familiar to anyone who frequents the local florist's shop, but it's been a long wait for alstroemeria plants that are suited to home gardeners' needs. The wait is over. These dwarf beauties, known as Princess Lilies, were created to produce long seasons of vibrant color, blooms richly festooned with contrasting shades and lots of those endearing "whiskers". Dwarf alstroemeria are ideal for brilliant containers, alone of mixed with other plants, and for accenting smaller garden beds.







Outdoor Beds
  1. Find a location where the soil drains well. If there are still water puddles 5-6 hours after a hard rain, scout out another site. Or amend the soil with the addition of organic material to raise the level 2-3 inches to improve the drainage. Peat moss, compost, ground bark or decomposed manure all work well and are widely available. Alstroemeria plants must not sit in waterlogged soil or they will rot.
  2. Site your alstroemerias where they will receive full day sun or lightly filtered sunshine.
  3. Dig holes and situate the plants so that the soil level on the root ball from the pot you receive is even with that in your bed. Tuck the plants in and tamp down the soil to remove any air pockets.
  4. After planting, water your alstroemerias generously, soaking the soil to settle it around the root ball. Plants grow quickly in warm soil. If the soil is still quite cool, wait until it warms before planting outdoors or start indoors in containers.
  5. Water as needed during the growing season. Alstroemeria tend to be a bit thirsty and will produce the largest number of flowers when provided with generous amounts of water, keeping in mind that the soil can not be allowed to become soggy.
  6. In warm areas where Alstroemeria are winter hardy (zones 8-10) your plants can stay outdoors during the cool months and may produce sporadic flushes of blooms. If you garden in the warmer part of zone 7B you may be able to protect your plants during the winter with a 3-4" layer of leaves or pine needles. The goal is to keep the soil temperature as warm and constant as possible. Alstroemeria typically will not survive outdoors in colder areas.
  7. Water lightly during the winter. Your alstroemerias will rest for a few months before beginning the next growing cycle.
Planters, Pots, Tubs, Urns and Windowboxes
  1. Fill your containers with good quality, well-drained soil. Almost any commercially available potting medium will work fine. Make sure there are adequate drainage holes; alstroemeria plants must not sit in waterlogged soil or they will rot.
  2. Site your alstroemerias where they will receive full day sun or lightly filtered sunshine.
  3. Dig holes and situate the plants so that the soil level on root ball from the 4" pot is even with that in your container. Tuck the plants in and tamp down the soil to remove any air pockets.
  4. After planting, water your alstroemerias generously, soaking the soil to settle it around the root ball. Plants grow quickly in warm soil. If the soil is still quite cool, wait until it warms before planting outdoors or start indoors in containers. Plants in terra cotta pots, that lose water through evaporation across their entire surface, need to be watered more frequently.
  5. Water as needed during the growing season. Alstroemeria tend to be a bit thirsty and will produce the largest number of flowers when provided with generous amounts of water, keeping in mind that the soil can not be allowed to become soggy.
  6. In warm areas where Alstroemeria are winter hardy (zones 8-10) your plants can stay outdoors during the cool months and may produce sporadic flushes of blooms.
  7. In areas cooler than zone 8, it is advisable to bring your Alstroemeria inside during the cold months. Situate the plants in a sunny window. Don't be concerned if a few leaves fall off as the plant adjusts from the outdoor environment to the indoor one. Water lightly during the winter.
  8. Your alstroemerias may be moved outdoors again when the weather warms. Remember the nights must be warm, too, before relocating your plants outdoor.




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