To be more specific and answer your question, after LAST frost I would put the pot outside. You are in zone 6 right? Keep in a sunny location, water well and after 1st frost follow previous advice. Here's what I include with bulbs I've given away or donated plant sales: Zantedeschia albomaculata: Calla Lily Form: Tender bulb. Exposure: Full Sun. Height: 24" (to 30" bloom). Spread: 18-24". Zone: 8-10. Flower Date: June-July. >Planting Reqs: Plant 4-8" deep and 18-24" apart when all danger of frost has passed (last week of May in ELong.). I plant those in back 4" deep and those in front 6-8" then cover all with 2" of compost/mulch. Fertilize using a 5-10-10 or 5-10-5 fertilizer. >Lifting Reqs: Lift the rhizomes after first frost, cut back stems, clean off excess soil, let dry out of the direct sun for a few days and then store in a dry location that remains between 50 and 60 degrees F. They can be divided before storage as long as the cut portions are allowed to dry. Doing so will prevent the open wounds from rotting. I use perlite in a PAPER bag. Check in late January. If rot is evident cut, scrape and clean off all rot. Coat cut surface liberally with powdered anti-fungal or cinnamon pushed firmly into flesh. Let dry and store. >Soil Reqs: Slightly acidic (6-6.5) well drained, humus enriched sandy loam. Adding mulch to the soil will help maintain a constant soil temperature. This will help keep the plant stress-free. Mulch will also improve the texture of the soil and help hold in valuable moisture. Calla lilies thrive in well-drained, loose soil. >Pruning: Remove spent flower stems to tidy up your plants and strengthen leaves and corm. >Note: Watch out for Japanese Beetles. Hope this helps. Evan

I think the key for both the tulip and lily is good draining soil. Poor drainage can potentially cause rot in both types of bulbs. The foliage is what technically "feeds" the bulb, although some supplement (good composted materials and perhaps some bulb fertilizer or bone meal) might help build a strong root system. Since your lily is up that tall, it might be better, if possible, to wait until the fall to move it as the stem is dying back. That way you have a better chance at getting a decent bloom next year. Otherwise, if you move, try to dig down deep and be careful of breaking the stem. You might find babies under the soil too.

We were all beginners at one time...and the folks here are very very helpful. I pot up lilies all the time...I get these discount bulbs in NYC that I cannot stop buying...and I pot them up all the time. I put 3 or 4 into a 12 inch container and they do fine. Put in about 4 inches of potting soil into the pot, then the bulbs, then fill it up with more potting soil. Give it a good watering and wait. Since yours are already growing, put in enough potting soil to reproduce how it came out of the garden. If I like the flowers alot, I find space for them in the garden during the Fall. If you pot them up, remember that lilies are heavy feeders and the good stuff tends to get washed out of the container. I feed mind once a month with some liquid fertilizer. I too have moved lilies once they've sprouted...generally they're only 5 inches or so high but as long as you move them SLOWLY and CAREFULLY (read that gently), you have a good chance of the lily coming through with flying colors. Welcome to the Lily world...I'm rather new at this compared to others. I started on a lark about 3 years ago...but once I saw how easy it was to have such magnificent flowers in my garden, well there was no stopping me. One more thing...after your lilies bloom, cut of the dead flowers and let the stalk remain until it dies back naturally. If you want to transplant again, wait until the Fall. Enjoy your plants! Ciao, OITGAD

There used to be a plump flowering specimen growing on a balcony along Oriental Parade... ;-) An innocent Xeronema. But, seriously. You might like to try http://www.tawapou.co.nz/. They're in the Far North. There was also a couple of sellers on TradeMe - one Hawke's Bay and one Auckland area, but they seemed to be smaller plants. Could be worth an enquiry, though. http://www.trademe.co.nz/home-living/outdoor-garden-conservatory/plants-pots/other/auction-433509639.htm. They're spectacular. Good luck with your search.