You certainly got your monies worth there picidae, what a healthy looking plant you have from this petunia, I wouldn't have thought they could overwinter and still look this good in March. At the moment I will be pleased if the few seeds I have germinate - I am having germination problems this Spring!
Kili and Picidea, you seem to have winning regimes for your seeds and I hope mine are as successful at germinating. I have sown and watered mine today (half of the seeds) in a module tray in cold greenhouse that was 25 degrees today, also drops down to around 8 c in the night time. I wish I had bought them earlier, as it is now getting a bit late here for planting seeds as the temperatures rise. They won't be ready to plant out for a few weeks yet.
Hi Guernsey Donkey2 . If I were you I wouldn't put your petunia seed in the greenhouse at night as this will check their growth with low temperatures at such an early stage in there growth.If you have day time temperatures of 20c in the greenhouse that's fine stick em in there during the day but bring them in at night. Petunias in my experience are very slow growing from seed so give them the best chance to grow by giving them the ideal temperatures for as long as possible.
I would try to maintain a temperature of approx 15-20 c 24 hours a day until they propagate and then I would maintain them at that temperature until the weather improves to the point where you have at least 10c consistently at night (It will be that soon in a couple of weeks when we get to May well, at least this far South) then put them in the greenhouse.
Mine are at a point in there growth were they can take the lower temperatures at night but young seedlings just emerging need a consistent temperature of 15-20c to grow rapidly.
Good luck, its a bit late sowing now but you will at least have a good showing in August and September where as mine will be all but over by then.
'The power of accurate observation .... is commonly called cynicism by those that have not got it.
Their advice? Day time temperatures 18-21° C and night time 12° C. My understanding is that petunias need to grow on at around 10 - 15° to encourage basal branching.
Just a word of caution: there are two types or Red Velour - Tidal Wave and Easy Wave. Tidal Wave, which is the one I grew last season, attains a height of 16 - 22”, spreads 30 - 60” and has a recommended spacing of 12 - 24” Easy Wave has a height of just 6 - 12”, spread 30 - 39”, spacing 10 - 15”
With something to scramble up Tidal Wave can reach 3’+
Thank you for our advice Kili and Picidea, I will sow another small batch of the petunia seeds this week and intend to bring them in during the night - our lounge is around 18 - 20 degrees so that should be acceptable to them. Would you cover the seed tray too - I have perspex lids for some of my module trays which keep the warmth in. I believe they are called Tidal Wave, with red flowers.
Thank you for our advice Kili and Picidea, I will sow another small batch of the petunia seeds this week and intend to bring them in during the night - our lounge is around 18 - 20 degrees so that should be acceptable to them. Would you cover the seed tray too - I have perspex lids for some of my module trays which keep the warmth in. I believe they are called Tidal Wave, with red flowers.
Hi, no need to cover them in the house. If your house is well insulated it should (like mine) maintain a temperature of at least 18c. If you put them in the greenhouse early morning I would pop a cover on the tray or just wait until around 10:30 am when the temperature has risen. It all depends on the location of your green house and when the sun hits it.
Kili
'The power of accurate observation .... is commonly called cynicism by those that have not got it.
I have decided to leave them in the GH with cover taken off if really hot in there (above 20) and just cover them at night when I also close the GH, the weather is supposed to warm up soon. I try to water the trays when they are dry, probably once every 2 or 3 days.
Thanks for the link Fire - I will wait to see if mine germinate, although nothing showing now - I have to weigh up how badly I want them against the cost. Did you buy some from Peter?
Posts
Petunias in my experience are very slow growing from seed so give them the best chance to grow by giving them the ideal temperatures for as long as possible.
I would try to maintain a temperature of approx 15-20 c 24 hours a day until they propagate and then I would maintain them at that temperature until the weather improves to the point where you have at least 10c consistently at night (It will be that soon in a couple of weeks when we get to May well, at least this far South) then put them in the greenhouse.
Mine are at a point in there growth were they can take the lower temperatures at night but young seedlings just emerging need a consistent temperature of 15-20c to grow rapidly.
Good luck, its a bit late sowing now but you will at least have a good showing in August and September where as mine will be all but over by then.
'The power of accurate observation .... is commonly called cynicism by those that have not got it.
George Bernard Shaw'
https://www.wave-rave.com/Howto/
Their advice? Day time temperatures 18-21° C and night time 12° C. My understanding is that petunias need to grow on at around 10 - 15° to encourage basal branching.
Just a word of caution: there are two types or Red Velour - Tidal Wave and Easy Wave.
Tidal Wave, which is the one I grew last season, attains a height of 16 - 22”, spreads 30 - 60” and has a recommended spacing of 12 - 24”
Easy Wave has a height of just 6 - 12”, spread 30 - 39”, spacing 10 - 15”
With something to scramble up Tidal Wave can reach 3’+
Kili
'The power of accurate observation .... is commonly called cynicism by those that have not got it.
George Bernard Shaw'