![]() So, this was all about selecting, planting, and harvesting petunia seeds. Follow the same steps mentioned above to sow seeds of petunia, and transplant petunia plantlets. Store these seeds in a cool and dry area, until the return of favorable growth conditions. ![]() When the blooms dry out, pinch at the base, and store them in an airtight container. Or else, allow a few of them to dieback naturally for seed harvesting. In order to extend flowering period, you can pinch of the flowers. Harvesting the SeedsĪs the petunia flowers fade and mature, they produce seeds in a seedpod at the lower portion of the flower. ![]() The plants will grow to about 12 – 15 inches tall. After frosting is over, and when the soil temperature measures 60 degrees F, transplant petunia plants in well-drained garden soil. Harden them before transplantation by placing outdoors in bright light during day time. They look great when planted to frame a path entrance.The petunia plantlets are ready for transplantation within 8 – 10 weeks after sowing. Try planning your interplanting, using Petunias as carpet ground cover with taller bedding plants rising out of them. Petunias are perfect for the hanging baskets, troughs or in mass in a border. Grow Petunias for a seasonal display, pick new varieties year after year to enjoy the amazing choice of these busy plants. Petunia plants need to be acclimatised to outside condition before planting out (when all danger of frost has passed) at 30cm apart, in an open sunny position. When the seedlings are large enough to handle transplant them into trays 5cm apart. Petunia seeds should germinate within 10 to 21 days. Practise removing dead, diseased leaves, if in a container spray with an organic deterrent spray ![]() Mildew can be a problem in dry humid weather.Pick over the spent flower, regular watering is important during dry periods, Petunias will flag and let you know if they have no moisture.Petunias are hungry plants so use a slow-release fertiliser, and every few weeks use a seaweed foliar feed, changing to a Potash feed when the heavy flowering period begins.Petunias need a good sunny spot with rich, well-draining soil or decent peat-free compost.Harden off buy airing them during the day and plant out after frosts, June 1st being a good bench-mark. When your Petunia seedlings are up and have two distinct leaves, prick out using a dibber, making sure they are only handled by the leaves, replanting so they have more space to grow in either planting cells or seed tray. ![]() Gently firm the soil with a tamper and cover the seed with sieved soil and label
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