An update, with added advice to self for next year:
The sprouted seedlings have been transferred to their paper pots, 135 of them so far. Thank goodness for grandparents and all their newspapers. The seed soil was cold and waterlogged (it is January after all) The pots were filled and warmed gently on the radiator.
Paper pots are quick to make and take less paper than you would think. Hopefully the pots will be soft enough for the first roots to break through meaning there will be no need to disturb the seedlings when potting on the next time.
Chilli seeds in their forever pots
Do not let the moisture in the chitting pods evaporate completely or the roots shrivel and dry. This has happened to Habanero Primavero Red. Hopefully some of the remaining seeds will germinate as we have no more in the packet. Not buying any more.
Also, don’t leave the sprouted seedlings too long in the chitting pods as their roots become intertwined with the capillary matting. Some of the roots have snapped in the transferring process. Not sure whether they will survive or not but they will sulk for at least a week, no doubt. Maybe a vermiculite mix to germinate in would be best next year?
Discussion around the arrangements for the plants when they are in their final growing pots. It seems that potting on into pots of increasing size is recommended. Not just dumping a teeny tiny seedling into a 30cm pot and leaving it to get on with things.
Our seedlings are currently in 6cm peat free fibre pots. These will then be planted straight in to 9cm square plastic pots. We already have a million of these so it makes sense to reuse them. They also fit neatly onto the windowsill trays we have. The next pot sizes are more difficult. In the interest in reducing plastic use we will be comparing non-plastic solutions with a bulk buy of large plastic pots to use every year.
First thoughts bring terracotta to mind. It seems a lovely, old fashioned option, reminisce of Peter Rabbit and friends. However, our greenhouse staging is super wobbly aluminium trestle style benches. The staging might not be able to take the weight of 20 30cm terracotta pots filled with compost, chilli plant and watered every day. What about grow bags? Or potato sacks? Or troughs? And does each type of chilli need such a large pot? More research need.
We settle on secondhand, black plastic pots. Eek, not so PC these days but still very much out there in the market place. This is with a view to the pots being used year on year. Single use plastics are out of here. Reusing what already exists and cannot be recycled Hardwearing, easy to clean, uniform size and shape, good drainage but with excellent water retention qualities. One issue we have found with the fibre pots is that the water just evaporated right out of the sides of the pots, especially in the sun.
20L pots found on ebay, being sold on from a plant nursery. Not purchased yet as we are visiting a nursery at the weekend. They may have pots to spare…or may not. Worth waiting to see. The chillies can hang out in the smaller pots for a few more days, no peeking roots out of the bottoms yet.