Rose cutting, when do I pot on?

Hello all,
I have looked through previous threads and I apologise if this has already been covered and I missed the thread. I wonder if anyone can help? This year I have managed to successfully take some rose cuttings. I put
three cuttings per pot, covered them with a plastic bottle and left them outside. All of the cuttings have rooted and I can see some roots at the bottom of the pot.

My question is when do I pot them on to a bigger pot? Would I use the same potting mix as before and when should I remove the plastic bottles?

Many thanks in advance for any help you can give.

 

Hi

Are the cuttings this year ?
What compost have you used ?
Have the plastic bottles have a cap on them ?

Spruce

 

Hi Spruce,
Thanks, Yes the cuttings were taken this spring from new growth. I used 50/50 mix of vermiculite and john innis no 1 cutting compost. They are in 9 cm pots. The plastic bottles do still have the caps on.

 

Hi

Well done you , personally I would leave in the pots until the new buds start to swell in the spring , then pot up individually same compost mix which would be practically the same as I use but I just add horticultural grit to keep it more open and helps with drainage.

To get your cutting used to the big outside world I would remove the cap as this will let more air in and harden them up slightly , similar to clematis cuttings when a plastic bag is used I make pencil size holes and then leave for 3 to 4 weeks before I would remove the bag.
Some on here may recommend re-potting in the Autumn , but I always think they are NOT going to make any new roots and will just sit in the compost sulking over winter.

I hope you find this useful.

Spruce

 

Thank you, makes sense to plant in the spring

 

thanks @wiseowl

 

Hi spruce, thanks for your help, your advice worked for me. I now have strong healthy plants to add to my collection