22 Mar 22 Celeste Archer (Canada - Zone 7b Mild Temperate climate)
I think that your trombone will be ready to harvest in about 60 days (from seedling to harvest date - called a summer squash) -- and I think that butternut squash (pumpkins) take closer to 120 days (from seedling to harvest date - called a winter squash) ==> my best guess is they will not be flowering at the same time; so no cross pollination will occur. If for some reason you staggered the planting so they were to flower at the same time; my best guess is YES they can cross pollinate -- squash seems to cross pollinate with other squash easily....however, this is just a guess based on what I know about other squash.
22 Mar 22 John Mauger (Australia - temperate climate)
Tromboncino and butternut are both Cucurbitus moschato so would cross pollinate. As Cucurbits are pollinated by insects you would need to have a substantial distance between them (a few house blocks) to avoid this happening. If you want to save Tromboncino seed you would need to remove ALL of the male flowers off the butternuts as they appeared. The Butternuts would then be hybrid but the Tromboncino's should be pure. Check the botanical names of all pumpkins, squash, marrows, zucchinis, etc. before interplanting. If the specific name comes up with both, they will cross pollinate. Trust this helps
This planting guide is a general reference intended for home gardeners. We recommend that you take into account your local conditions in making planting decisions. GardenGrow is not a farming or commercial advisory service. For specific advice, please contact your local plant suppliers, gardening groups, or agricultural department.
The information on this site is presented in good faith, but we take no responsibility as to the accuracy of the information provided.
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This planting guide is a general reference intended for home gardeners. We recommend that you take into account your local conditions in making planting decisions. GardenGrow is not a farming or commercial advisory service. For specific advice, please contact your local plant suppliers, gardening groups, or agricultural department. The information on this site is presented in good faith, but we take no responsibility as to the accuracy of the information provided.
We cannot help if you are overrun by giant slugs.