Hi Swetpea,

I am sorry I cant answer your question, I just wanted to say welcome to GOY, I am a newbe too!

Hello Marion1,

thank you for your warm welcome :-)

Welcome from me also, Sweetpea!
Are these the white flowered Zantedeschias? If so, the cold winter might have had an effect, in which case, just be sure to mulch them well this winter. There are some other possibilities, though:
Have you been feeding them on a regular basis, especially potash?
Has a shade tree grown to the point where they are getting extra deep shade? They are somewhat shde tolerant, but should be within 6 feet of open sky, or have some dappled sun, to bloom well.
Are they very crowded in their clumps? They often need dividing after 3-4 years.

Hi Tugbrethil,

Thank you for your response. They are the white flowered Zantedeschias and based on what you have mentioned, i may have to divide 2 of them up and give them a good feed and mulch. I hope for the best this will work.
Thank you again :-)

You're welcome!

Should they be dug up or left in the ground for the winter? I had some new this year (calla lilies?) and I wouldn't want to lose them.

From my understanding, if they are the variety 'Crowborough', the can normally be left in the ground, though they may be damaged by an exceptionally cold winter. I would mulch them heavily, just in case. All other varieties should probably be dug up and stored through the winter.

im not sure which mine is so i will dig it up to be safe ~ thank you tug