New/old Heucher as /feed?/ nematodes?etc

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How can I give my newly purchased specimens the best start when planting in borders? Also how can I give my established plants a boost? Have taken on board the need to treat with nematodes this month.

Looking forward to your reply.

Hi Sue
Great job watering with nematodes now! (August – September time us great)
If you feed them all with liquid seaweed this will pick your older ones up and give the new ones a great start… helping to put them in good health.
Have fun with your heucheras
Kind regards Vicky

Vicky and Richard Fox