Fifty-one F1 crosses of ridge gourd in a Line × Tester set involving 20 parents were evaluated to study heterosis for growth, earliness, yield and quality parameters. Maximum standard heterosis for vine length (9.20%) was observed in KRG-7 x ASM, for number of leaves in KRG-11 x PN (172.12%), for number of branches in KRG-11 x PN (141.38%), for days to first male flower appearance in KRG-3 x PN (-19.48%), for node to first female flower appearance in KRG-9 x ASJ (-56.92%), for node to first female flower appearance in KRG-2 x ASM (-19.35%), for sex ratio in KRG-17 x PN (-40.34%), for per cent fruit set in KRG-16 x PN (36.45%), for number of fruits per vine in KRG-10 x PN (13.95%), for average fruit weight in KRG-6 x ASJ (36.34%), for fruit length in KRG-1 x ASJ (36.91%), for fruit diameter in KRG-12 x PN (55.09%), for fruit yield per plot in KRG-3 x ASM (26.53%), for fruit yield per hectare in KRG-3 x ASM (26.46%), for rind thickness in KRG-12 x PN (8.07%), for flesh thickness in KRG-12 x PN (70.27%), for number of seeds per fruits in KRG-16 x ASM (238.80%) and for seed yield per fruit in KRG-4xASM (201.11%). The four best performing F1 hybrids viz., the cross KRG-3×ASJ (23.61%) followed by KRG-3×PN (13.80%), KRG-10×PN (12.45%) and KRG-11×PN (6.00%) exhibited the highest standard heterosis for total yield per vine in order of merit. The higher yield recorded by these hybrids could be due to increased per cent fruit set and number of fruits per plant.